MIL-STD-1168B, DOD STANDARD PRACTICE AMMUNITION LOT NUMBERING AND AMMUNITION DATA CARDIdent. Num:
MIL-STD-1168B
Rev. Num:
B
MIL-STD-1168B, DOD STANDARD PRACTICE AMMUNITION LOT NUMBERING AND AMMUNITION DATA CARD. The purpose of lot numbering ammunition items and
creation of ammunition data cards as outlined herein is to
provide the identification of homogeneous materiel necessary to
assure accurate control of items during development and
experimental stages; during the movement of items from production
line to production line, from plant to plant, from plant to
storage facilities; while at test facilities or in the field; for
issue to the using services; to enable the proper establishment
and maintenance of surveillance records; and to provide a means
for properly identifying materiel when withdrawal of defective,
deteriorated, hazardous or obsolete ammunition and explosive
materiel from service is required.
MIL-STD-1180B, DOD INTERFACE STANDARD SAFETY STANDARDS FOR MILITARY GROUND VEHICLES (26 JAN 1983)Ident. Num:
MIL-STD-1180
Rev. Num:
B
MIL-STD-1180B, DOD INTERFACE STANDARD SAFETY STANDARDS FOR MILITARY GROUND VEHICLES (26 JAN 1983)., This standard applies to military ground vehicles listed in
table 1. Administrative vehicles and construction equipment/material
handling equipment acquired by the Department of Defense are not included in
this military standard since they are usually built to the manufacturer
commercial specifications and are required to meet all applicable standards.
MIL-STD-1201C, MILITARY STANDARD ETHYL ALCOHOL (ETHANOL), TECHNICAL AND DENATURED GRADESIdent. Num:
MIL-STD-1201
Rev. Num:
C
MIL-STD-1201C, MILITARY STANDARD ETHYL ALCOHOL (ETHANOL), TECHNICAL AND DENATURED GRADES. This standard is a presentation of nomenclature, Chemical Abstracts Service Registry Numbers, symbols, physical and chemical properties and requirements, military and typical commercial uses, directions for use, packaging data, labeling, general safety precautions, storage information, and shelf life of all military standard technical and denatured grades, ethyl alcohol. This standard does not necessarily include all classifications of the item represented by the title of those which are commercially available. It does contain items preferred for use in the selection of technical and denatured grades, ethyl alcohol, for application by the Department of Defense.
MIL-STD-1202A, MILITARY STANDARD FACESHIELD, INDUSTRIALIdent. Num:
MIL-STD-1202
Rev. Num:
A
MIL-STD-1202A, MILITARY STANDARD FACESHIELD, INDUSTRIAL. The purpose of this standard is to present the nomenclature, specification requirements, military uses, and safety information for industrial faceshields. This standard does not necessarily include all those items which are commercially available. It does contain items preferred for use in the selection of industrial faceshields for the application by the Department of Defense.
MIL-STD-1203B, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (ALUMINUM CHLORIDE THROUGH BORON NITRIDE)Ident. Num:
MIL-STD-1203
Rev. Num:
B
MIL-STD-1203B, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (ALUMINUM CHLORIDE THROUGH BORON NITRIDE). This standard is a presentation of nomenclature, formulas, physical and chemical properties, specification requirements, military and typical commercial uses, safety information, storage information, and disposal information for in organic salts and compounds, technical grade, (aluminum chloride through boron nitride).
MIL-STD-1204C, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (CADMIUM CARBONATE THROUGH CUPRIC SULFATE)Ident. Num:
MIL-STD-1204
Rev. Num:
C
MIL-STD-1204C, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (CADMIUM CARBONATE THROUGH CUPRIC SULFATE). This standard is a presentation of nomenclature, formulas, physical and chemical properties, specification requirements, military and typical commercial uses, safety information, storage information and disposal information for inorganic salts and compounds, technical grade (cadmium carbonate through cupric sulfate.) This standard does not include all of the items represented by the title or all those items which are commercially available. It does contain items preferred for use in the selection of inorganic salts and compounds technical grade (cadmium carbonate through cupric sulfate) for application by the Department of Defense.
MIL-STD-1205B, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (FERRIC CHLORIDE THROUGH LITHIUM TETRAFLUOROBORATE)Ident. Num:
MIL-STD-1205
Rev. Num:
B
MIL-STD-1205B, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (FERRIC CHLORIDE THROUGH LITHIUM TETRAFLUOROBORATE). This standard is a presentation of nomenclature, Chemical Abstracts Service Registry Numbers, formulas, physical and chemical properties, specification requirements, military and typical commercial uses, safety information, storage information and disposal information for inorganic salts and compounds, technical grade (ferric chloride through lithium tetrafluoroborate). This standard does not include all of the items represented by the title of all those items which are commercially available. It does contain items preferred for use in the selection of inorganic salts and compounds, technical grade (ferric chloride through lithium tetrafluoroborate), for application by the Department of Defense.
MIL-STD-1206B, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (MAGNESIUM CARBONATE THROUGH PHOSPHORUS TRICHLORIDE)Ident. Num:
MIL-STD-1206
Rev. Num:
B
MIL-STD-1206B, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (MAGNESIUM CARBONATE THROUGH PHOSPHORUS TRICHLORIDE). This standard is a presentation of nomenclature, Chemical Abstracts Service Registry Numbers, formulas, physical and chemical properties, specification requirements, military and typical commercial uses, safety information, storage information and disposal information for inorganic salts and compounds, technical grade (magnesium carbonate through phosphorus trichloride). This standard does not include all of the items represented by the title or all those items which are commercially available. It does contain items preferred for use in the selection of inorganic salts and compounds, technical grade (magnesium carbonate through phosphorus trichloride), for application by the Department of Defense.
MIL-STD-1207B, INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (POTASSIUM BICARBONATE THROUGH SILVER CYANIDE) (METRIC)Ident. Num:
MIL-STD-1207
Rev. Num:
B
MIL-STD-1207B, INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (POTASSIUM BICARBONATE THROUGH SILVER CYANIDE) (METRIC). The purpose of this standard is to present the nomenclature, formulas, physical and chemical properties, specification requirements, military and typical commercial uses, safety information, storage information and disposal information for inorganic salts and compounds, technical grade (potassium bicarbonate through silver cyanide). This standard does not necessarily include all of those items which are commercially available. It does contain items preferred for use in the selection of inorganic compounds, for application by the Department of Defense.
MIL-STD-1208B, MILITARY STANDARD INORGANIC SODIUM SALTS AND COMPOUNDS, TECHNICAL GRADE (SODIUM BICARBONATE THROUGH SODIUM TRIPOLYPHOSPHATE)Ident. Num:
MIL-STD-1208
Rev. Num:
B
MIL-STD-1208B, MILITARY STANDARD INORGANIC SODIUM SALTS AND COMPOUNDS, TECHNICAL GRADE (SODIUM BICARBONATE THROUGH SODIUM TRIPOLYPHOSPHATE). This standard is a presentation of nomenclature, formulas, physical and chemical properties, specification requirements, military and typical commercial uses, safety information, storage information and disposal information for inorganic salts and compounds, technical grade (sodium bicarbonate through sodium tripolyphosphate). This standard does not include all of the items represented by the title or all of those items which are not commercially available. It does contain items preferred for use in the selection of inorganic salts and compounds, technical grade (sodium bicarbonate through sodium tripolyphosphate), for application by the Department of Defense.
MIL-STD-1209B, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (STRONTIUM CARBONATE THROUGH ZIRCONIUM CARBIDE)Ident. Num:
MIL-STD-1209
Rev. Num:
B
MIL-STD-1209B, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS, TECHNICAL GRADE (STRONTIUM CARBONATE THROUGH ZIRCONIUM CARBIDE). This standard is a presentation of nomenclature, Chemical Abstracts Service Registry Numbers, formulas, physical and chemical properties, specification requirements, military and typical commercial uses, safety information, storage information and disposal information for inorganic salts and compounds, technical grade (strontium carbonate through zirconium carbide). This standard does not include all of the items represented by the title or all those which are commercially available. It does contain items preferred for use in the selection of inorganic salts and compounds, technical grade (strontium carbonate through zirconium carbide), for application by the Department of Defense.
MIL-STD-1210B, MILITARY STANDARD FOG AND ICE PREVENTIVE COMPOUNDSIdent. Num:
MIL-STD-1210
Rev. Num:
B
MIL-STD-1210B, MILITARY STANDARD FOG AND ICE PREVENTIVE COMPOUNDS. This standard is a presentation of nomenclature, symbols, physical and chemical properties and requirements, military and typical commercial uses, directions for use, packaging data, labeling, general safety precautions, storage information, and shelf life of all military standard fog and ice preventative compounds.
MIL-STD-1211, MILITARY STANDARD INDICATORSIdent. Num:
MIL-STD-1211
MIL-STD-1211, MILITARY STANDARD INDICATORS. This standard is a presentation of nomenclature, symbols, chemical and physical properties and requirements, military use, directions for use, packaging data, labeling, storage information, and shelf life of all military standard indicators.
MIL-STD-1212A, MILITARY STANDARD INDUSTRIAL SAFETY BELTS, STRAPS, AND RELATED EQUIPMENTIdent. Num:
MIL-STD-1212
Rev. Num:
A
MIL-STD-1212A, MILITARY STANDARD INDUSTRIAL SAFETY BELTS, STRAPS, AND RELATED EQUIPMENT. The purpose of this standard fs to present the nomenclature,
specification requirements, military uses, and safety information for industrial
safety belts, straps, harnesses, lanyards, and related equipment. The
standard does not necessarily include all of those items which are commercially
available. It does contain items preferred for use in the selection of industrial
safety belts, straps, harnesses, lanyards, and related equipment, for
application by the Department of Defense.
MIL-STD-1213A, MILITARY STANDARD ORGANIC LABORATORY REAGENTS (INCLUDING ACS AND USP/NF)Ident. Num:
MIL-STD-1213
Rev. Num:
A
MIL-STD-1213A, MILITARY STANDARD ORGANIC LABORATORY REAGENTS (INCLUDING ACS AND USP/NF). This standard is a presentation of nomenclature, formulas, physical and chemical properties, specification requirements, military uses, safety information, storage information and disposal information for organic laboratory reagents.
MIL-STD-1214A, MILITARY STANDARD ESTERS AND METAL ORGANICS, TECHNICAL GRADEIdent. Num:
MIL-STD-1214
Rev. Num:
A
MIL-STD-1214A, MILITARY STANDARD ESTERS AND METAL ORGANICS, TECHNICAL GRADE. This standard is a presentation of nomenclature, formulas, physical and chemical properties, specification requirements, military and typical commercial uses, safety information, storage information and disposal information for esters and metal organics, technical grade.
MIL-STD-1216A, MILITARY STANDARD PREVENTIVE COMPOUNDS (CORROSION) AND INHIBITORSIdent. Num:
MIL-STD-1216
Rev. Num:
A
MIL-STD-1216A, MILITARY STANDARD PREVENTIVE COMPOUNDS (CORROSION) AND INHIBITORS. This standard is a presentation of nomenclature, symbols, physical and chemical properties and requirements, military and typical commercial uses, directions for use, packaging data, labeling, general safety precautions, storage information, and shelf life of military corrosion preventive compounds and inhibitors coming under FSC 6850.
MIL-STD-1217C, MILITARY STANDARD ORGANIC ACIDS AND ACID ANHYDRIDES, TECHNICAL GRADEIdent. Num:
MIL-STD-1217
Rev. Num:
C
MIL-STD-1217C, MILITARY STANDARD ORGANIC ACIDS AND ACID ANHYDRIDES, TECHNICAL GRADE. This standard is a presentation of nomenclature, symbols, physical and chemical properties and requirements, military and typical commercial uses, directions for use, packaging data, labeling, general safety precautions, storage information, shelf life and disposal instructions for military standard organic acids.
MIL-STD-1218, MILITARY STANDARD ACS CHEMICALSIdent. Num:
MIL-STD-1218
MIL-STD-1218, MILITARY STANDARD ACS CHEMICALS. This standard is a presentation of nomenclature, symbols, physical and chemical properties and requirements, typical military uses, packaging data and labeling, storage information, and shelf life of military standard ACS grade chemicals.
MIL-STD-1220B, MILITARY STANDARD ALCOHOLS AND AMINES, TECHNICAL GRADE. Ident. Num:
MIL-STD-1220
Rev. Num:
B
MIL-STD-1220B, MILITARY STANDARD ALCOHOLS AND AMINES, TECHNICAL GRADE. This standard is a presentation of nomenclature, formulas, physical and chemical properties, specification requirements, military and typical commercial uses, safety information, storage information and disposal information for aldehydes and ketones, technical grade.
MIL-STD-1221, MILITARY STANDARD PROTECTIVE COMPOUNDS (FOR PERSONNEL)Ident. Num:
MIL-STD-1221
Rev. Num:
A
MIL-STD-1221, MILITARY STANDARD PROTECTIVE COMPOUNDS (FOR PERSONNEL). This standard is a presentation of nomenclature, symbols, physical and chemical properties and requirements, military and typical commercial uses, directions for use, packaging data, labeling, general safety precautions, storage information, disposal data, toxicity data and shelf life of all military standard protective compounds (for personnel).
MIL-STD-1221, MILITARY STANDARD PROTECTIVE COMPOUNDS (FOR PERSONNEL)Ident. Num:
MIL-STD-1221
MIL-STD-1221, MILITARY STANDARD PROTECTIVE COMPOUNDS (FOR PERSONNEL). This standard is a presentation of nomenclature, symbols, physical and chemical properties and requirements, military and typical commercial uses, directions for use, packaging data, labeling, general safety precautions, storage information, disposal data, toxicity data and shelf life of all military standard protective compounds (for personnel).
MIL-STD-1222, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS,ANALYZED REAGENT AND REAGENT GRADE (5 JUN 1969)Ident. Num:
MIL-STD-1222
MIL-STD-1222, MILITARY STANDARD INORGANIC SALTS AND COMPOUNDS,ANALYZED REAGENT AND REAGENT GRADE (5 JUN 1969). This standard is a presentation of nomenclature, formulas,
chemical and physical properties and requirements, military use, packaging
data, labeling, storage information, and shelf life of all military inorganic
salts and compounds, analyzed reagent and reagent grade. This
standard does not necessarily include all classifications of the items
represented by the title or those which are commercially available. It
does contain items preferred for use in the selection of inorganic salts
and compounds, analyzed reagent and reagent grade for application by the
Department of Defense.
MIL-STD-1227B (NOTICE 1), MILITARY STANDARD ENGINE, GASOLINE: AIR-COOLED, 3 BHP 4-CYCLE, MILITARY DESIGN, MODEL 2A016, INSTALLATION PROCEDURESIdent. Num:
MIL-STD-1227
Rev. Num:
B
MIL-STD-1227B (NOTICE 1), MILITARY STANDARD ENGINE, GASOLINE: AIR-COOLED, 3 BHP 4-CYCLE, MILITARY DESIGN, MODEL 2A016, INSTALLATION PROCEDURES. TO ALL HOLDERS 0F MIL-STD-1227B THE FOLLOWING PEN AND INK CHANGES SHALL BE MADE:
MIL-STD-1227B, MILITARY STANDARD ENGINE, GASOLINE: AIR-COOLED, 3 BHP, 4-CYCLE, MILITARY DESIGN, MODEL 2A016, INSTALLATION PROCEDURESIdent. Num:
MIL-STD-1227
Rev. Num:
B
MIL-STD-1227B, MILITARY STANDARD ENGINE, GASOLINE: AIR-COOLED, 3 BHP, 4-CYCLE, MILITARY DESIGN, MODEL 2A016, INSTALLATION PROCEDURES. This standard covers the recommended installation procedure for
the model 2A016, 3 hp, military design engine.
MIL-STD-1234, MILITARY STANDARD PYROTECHNICS: SAMPLING, INSPECTION AND TESTINGIdent. Num:
MIL-STD-1234
MIL-STD-1234, MILITARY STANDARD PYROTECHNICS: SAMPLING, INSPECTION AND TESTING. This standard describes the general methods of sampling, inspecting, and testing pyrotechnics for conformance with the material requirements of the applicable pyrotechnic specification. In the event of conflict between these methods and those in the applicable pyrotechnic specification, the latter shall take precedence.
MIL-STD-1249A, MILITARY STANDARD PROCEDURES FOR THE FUNCTIONAL CATEGORIZATION OF GUIDED MISSILE ELECTRICAL AND ELECTRONIC TEST FUNCTION TERMSIdent. Num:
MIL-STD-1249
Rev. Num:
A
MIL-STD-1249A, MILITARY STANDARD PROCEDURES FOR THE FUNCTIONAL CATEGORIZATION OF GUIDED MISSILE ELECTRICAL AND ELECTRONIC TEST FUNCTION TERMS. The scope of the categorization procedures contained in this military standard covers the functional classification of the inherent electrical or electronic test function capabilities of an item and the delineation of its pertinent characteristics. The technical data resulting from these categorization procedures will provide the government with the documentation necessary to revise MIL-HDBK-142 to reflect technological advances and changes in military requirements for this type of equipment.
MIL-STD-1250, MILITARY STANDARD CORROSION PREVENTION AND DETERIORATION CONTROL IN ELECTRONIC COMPONENTS AND ASSEMBLIESIdent. Num:
MIL-STD-1250
MIL-STD-1250, MILITARY STANDARD CORROSION PREVENTION AND DETERIORATION CONTROL IN ELECTRONIC COMPONENTS AND ASSEMBLIES. This standard serves as a guide and establishes minimum requirements for procedures, materials and systems for protecting electronic components and assemblies from adverse environments. Protective measures shall be sufficient to maintain performance characteristics within specified limits both during and after exposure to moisture, high and low temperature, corrosive gases, chemicals, and microbial attack. This standard does not deal with protection against damage from stress, shock, or vibration. It is not concerned with electrical or mechanical design except insofar as design details affect susceptibility to corrosion. Provisions for prevention of deterioration shall apply to housings, chassis, hardware, and similar parts which are assembled into electronic equipment, as well as to electronic and electro-mechanical components. Unless specifically mentioned in the item specification or drawing, this standard does not apply to standard commercial equipment.

MIL-STD-1250A, MILITARY STANDARD CORROSION PREVENTION AND DETERIORATION CONTROL IN ELECTRONIC COMPONENTS AND ASSEMBLIESIdent. Num:
MIL-STD-1250
Rev. Num:
A
MIL-STD-1250A, MILITARY STANDARD CORROSION PREVENTION AND DETERIORATION CONTROL IN ELECTRONIC COMPONENTS AND ASSEMBLIES. This standard establishes minimum requirements for procedures, materials and systems for protecting electronic components in DoD systems and assemblies from adverse environments. Protective measures shall be sufficient to maintain performance characteristics within specified limits both during and after exposure to moisture, high and low temperatures, corrosive gases, chemicals and microbial (fungal) attack. This standard does not deal with protection against damage from stress, shock, vibration or nuclear, biological and chemical (NBC) contamination.
MIL-STD-1267, MILITARY STANDARD DIMENSIONING OF BARREL CHAMBERS SMALL ARMS WEAPONSIdent. Num:
MIL-STD-1267
MIL-STD-1267, MILITARY STANDARD DIMENSIONING OF BARREL CHAMBERS SMALL ARMS WEAPONS. This document establishes standard methods of dimensioning barrel chambers for small arms weapons on detailed drawings for each type of barrel chamber described herein. It also establishes standard methods for specifying headspace dimensions for the assembled weapon.
MIL-STD-1270A, MILITARY STANDARD PATCHING OF WOOD STOCKS FOR THE 7.62 MM, M14 AND M14E2 RIFLESIdent. Num:
MIL-STD-1270
Rev. Num:
A
MIL-STD-1270A, MILITARY STANDARD PATCHING OF WOOD STOCKS FOR THE 7.62 MM, M14 AND M14E2 RIFLES. This document establishes standard materials and procedures for patching of wood stocks for the 7.62 MM, M14, and M14E2 rifles, and limits the size and location of defects which may be repaired by teh application of wood patches and plastic fillers.
MIL-STD-1276, DEPARTMENT OF DEFENSE INTERFACE STANDARD LEADS FOR ELECTRONIC COMPONENT PARTSIdent. Num:
MIL-STD-1276
MIL-STD-1276, DEPARTMENT OF DEFENSE INTERFACE STANDARD LEADS FOR ELECTRONIC COMPONENT PARTS. This standard establishes the method of identifying, specifying, and limiting to a minimum the combinations of basic materials, the thickness and composition of the plating used therewith, and the sizes of wire and flat wire (ribbon) leads on electronic and electrical parts when they are to be soldered or welded during assembly in equipment.
MIL-STD-1276E, DEPARTMENT OF DEFENSE INTERFACE STANDARD LEADS FOR ELECTRONIC COMPONENT PARTS Ident. Num:
MIL-STD-1276
Rev. Num:
E
MIL-STD-1276E, DEPARTMENT OF DEFENSE INTERFACE STANDARD LEADS FOR ELECTRONIC COMPONENT PART. This standard establishes the method of identifying, specifying, and limiting to a minimum the combinations of basic materials, the thickness and composition of the plating used therewith, and the sizes for wire and flat wire (ribbon) leads on electronic and electrical parts when they are to be soldered or welded during assembly in equipment.
MIL-STD-1276F, DEPARTMENT OF DEFENSE INTERFACE STANDARD LEADS FOR ELECTRONIC COMPONENT PARTSIdent. Num:
MIL-STD-1276
Rev. Num:
F
MIL-STD-1276F, DEPARTMENT OF DEFENSE INTERFACE STANDARD LEADS FOR ELECTRONIC COMPONENT PARTS. This standard establishes the method of identifying, specifying, and limiting to a minimum the combinations of basic materials, the thickness and composition of the plating used therewith, and the sizes of wire and flat wire (ribbon) leads on electronic and electrical parts when they are to be soldered or welded during assembly in equipment.
MIL-STD-1277B (NOTICE 1), MILITARY STANDARD SPLICES, TERMINALS, TERMINAL BOARDS, BINDING POSTS, TERMINAL JUNCTION SYSTEMS, WIRE CAPS; ELECTRICALIdent. Num:
MIL-STD-1277
Rev. Num:
B
MIL-STD-1277B (NOTICE 1), MILITARY STANDARD SPLICES, TERMINALS, TERMINAL BOARDS, BINDING POSTS, TERMINAL JUNCTION SYSTEMS, WIRE CAPS; ELECTRICAL. MIL-STD-1277B, dated 28 December 1983, is hereby canceled.
MIL-STD-1277B, MILITARY STANDARD SPLICES TERMINALS, TERMINAL BOARDS, BINDING POSTS, TERMINAL JUNCTION SYSTEMS, WIRE CAPS; ELECTRICALIdent. Num:
MIL-STD-1277
Rev. Num:
B
MIL-STD-1277B, MILITARY STANDARD SPLICES TERMINALS, TERMINAL BOARDS, BINDING POSTS, TERMINAL JUNCTION SYSTEMS, WIRE CAPS; ELECTRICAL. This standard establishes a list for the selection of splices, terminals, terminal boards, binding posts, terminal junction systems, and wire caps designated as preferred for use in new design of military equipment. Complete detail requirements for splices, terminals, terminal boards, binding posts, terminal junction systems and wire caps listed in this standard are covered in the applicable military document listed herein.
MIL-STD-1278, MILITARY STANDARD FILTERS LIGHTS PHOTOGRAPHICIdent. Num:
MIL-STD-1278
MIL-STD-1278, MILITARY STANDARD FILTERS LIGHTS PHOTOGRAPHIC. This standard is issued to describe a general method of describing filters according to construction type, optical quality, and intended use, and to establish uniform definitions, general requirements (which includes the military filter designation system), detailed requirements, and test methods for filters used in military photographic work.