Defence Standard 00-23 Issue 4 - Sandtec AS

Ministry of DefenceDefence Standard 00-23Issue 4 Publication Date 12 July 2007Infra Red Reflective (IRR)Requirements for Painting MilitaryEquipment

DEF STAN 00-23 Issue 4ContentsIntroduction......................................................................................................................................................iv1 Scope ....................................................................................................................................................12 Warning.................................................................................................................................................13 Normative References .........................................................................................................................14 Description ...........................................................................................................................................15 Requirements .......................................................................................................................................25.1 Infra Red Reflectance (IRR) Properties...........................................................................................25.2 Colour.................................................................................................................................................25.2.1 NATO Green ....................................................................................................................................25.2.2 Other Colours .................................................................................................................................2Annex A Determination of Infra Red Reflectance .........................................................................................3Annex B Reflectance Curve for NATO Green .............................................................................................4Annex C Upper and Lower Reflectance Limits for NATO Green BS381C:285 ........................................5ii

DEF STAN 00-23 Issue 4ForewordAMENDMENT RECORDAmd No Date Text Affected Signature and DateREVISION NOTEThis standard is raised to Issue 4 to update its content and format.HISTORICAL RECORDThis standard supersedes the following:Defence Standard (Def Stan) 00-23 Issue 3 dated 30 May 2001.Defence Standard (Def Stan) 00-23 Issue 2 dated 31 December 1998.Defence Standard (Def Stan) 00-23 Issue 1 dated 17 Oct 1980.a) This standard provides the Infra Red Reflective (IRR) Requirements for Painting Military Equipment.b) This standard has been produced on behalf of the Defence Material Standardization Committee (DMSC)by the Coating & Coating Removal Working Group.c) This standard has been agreed by the authorities concerned with its use and is intended to be usedwhenever relevant in all future designs, contracts, orders etc. and whenever practicable by amendmentto those already in existence. If any difficulty arises which prevents application of the Defence Standard,UK Defence Standardization (DStan) shall be informed so that a remedy may be sought.d) Any enquiries regarding this standard in relation to an invitation to tender or a contract in which it isincorporated are to be addressed to the responsible technical or supervising authority named in theinvitation to tender or contract.e) Compliance with this Defence Standard shall not in itself relieve any person from any legal obligationsimposed upon them.f) This standard has been devised solely for the use of the Ministry of Defence (MOD) and its contractorsin the execution of contracts for the MOD. To the extent permitted by law, the MOD hereby excludes allliability whatsoever and howsoever arising (including, but without limitation, liability resulting fromnegligence) for any loss or damage however caused when the standard is used for any other purpose.iii

DEF STAN 00-23 Issue 4Infra Red Reflective (IRR) Requirements for Painting MilitaryEquipment1 ScopeThis standard defines the colour, colour tolerance and IRR requirements for a limited number of camouflagecolours.2 WarningThe Ministry of Defence (MOD), like its contractors, is subject to both United Kingdom and European lawsregarding Health and Safety at Work. All Defence Standards either directly or indirectly invoke the use ofprocesses and procedures that could be injurious to health if adequate precautions are not taken. DefenceStandards or their use in no way absolves users from complying with statutory and legal requirementsrelating to Health and Safety at Work.3 Normative References3.1 The publications shown below are referred to in the text of this standard. Publications are groupedand listed in alpha numeric order.BS 381CBS 3900Specification for Colours for Identification, Coding and SpecialPurposesMethods of Test for Paints3.2 Reference in this standard to any normative reference means in any invitation to tender or contractthe edition and all amendments current at the date of such tender or contract unless a specific edition isindicated.3.3 In consideration of 3.2 above, users shall be fully aware of the issue and amendment status of allnormative references, particularly when forming part of an invitation to tender or contract. Responsibility forthe correct application of standards rests with users.3.4 DStan can advise regarding where normative references are obtained from. Requests for suchinformation can be made to the DStan Helpdesk. How to contact the helpdesk is shown on the outside rearcover of Def Stans.4 Description4.1 The specified properties defined in this standard are to be used in conjunction with the appropriatematerial specification, as specified in the contract or order. Additional colours and their IRR properties maybe defined.4.2 The appropriate material specification will define the panel preparation required for determining thecolour and IRR together with the other film properties required of the coating.4.3 A limited range of camouflage colours is specified.

DEF STAN 00-23 Issue 45 Requirements5.1 Infra Red Reflectance (IRR) PropertiesThe IRR properties of the paint shall comply with the requirements of Table 1.5.2 Colour5.2.1 NATO GreenThe colour difference, determined in accordance with BS 3900: Parts D8, D9 and D10, against a new BS381C, Colour No 285 card (or the stored reflectance data for a new BS 381C, Colour No 285 card) shall beas follows:dE* ab < 1.0 unitda*< 0.5 unit5.2.2 Other ColoursColours other than NATO Green, shall match the colour specified by the purchaser in accordance with BS3900 Part D1 under diffuse daylight.Table 1 Reflectance RequirementsColoursBS381CColour No.RequirementMethodNATO Green 285 Annex B at all wavelengths between 400and 1200 nm. Numeric values for the upperand lower limits are given in Annex CAnnex ABlack - ≤ 10 % at all wavelengths between 700 and1200 nmLight Stone 361 (45 ± 5) % at all wavelengths between 750and 1200 nmCamouflage Desert Sand 380 (45 ± 5) % at all wavelengths between 750and 1200 nm2

Annex ADetermination of Infra Red ReflectanceDEF STAN 00-23 Issue 4A.1 Test Sample PanelThe test panel shall be prepared and painted in accordance with the relevant material standard withparticular reference to the specified full paint scheme and dry film thickness. In the absence of a specificmaterial standard, the test panel shall be prepared and painted in accordance with the paint manufacturersinstructions and the agreement of the responsible Technical Authority named in the contract or order.A.2 ApparatusA.2.1 A recording spectrophotometer fitted with an integrating sphere. Illumination of the sample shall beat an angle not exceeding 10° from the normal. Measurements shall be made with the specular componentof reflection, included in the 8°/t geometry. The instrument shall meet the following requirements:Measuring rangeWavelength accuracy400 nm to 1200 nm± 5 nmMeasuring accuracy ± 2%A.2.2 The 100% baseline shall be calibrated using a reflectance standard that is traceable to a NationalStandard. Between the wavelengths 400 nm to 1200 nm the standard shall have an absolute reflectance atleast 98%. Reflectance grade PTFE, such as Spectralon, has been found to be suitable.A.3 ProcedureUsing the spectrophotometer in accordance with the manufacturer’s instructions, obtain the reflectance ofthe painted panel surface at 10 nm intervals over the range specified in Table 1.3

DEF STAN 00-23 Issue 4Annex BReflectance Curve for NATO Green4

Annex CUpper and Lower Reflectance Limits for NATO Green BS381C:2855WavelengthnmLower Limit% ReflectanceUpper Limit% ReflectanceWavelengthnmLower Limit% ReflectanceUpper Limit% ReflectanceWavelengthnmLower Limit% ReflectanceUpper Limit% Reflectance300 5 610 12 920 25 40310 5 620 12 930 25 40320 5 630 12 940 25 40330 5 640 12 950 25 40340 5 650 12 960 25 40350 5 660 16.6 970 25 40360 5.8 670 21.2 980 25 40370 6.6 680 25.8 990 25 40380 7.4 690 30.4 1000 25 40390 8.2 700 35 1010 24 40400 9 710 36 1020 23 40410 9.2 720 37 1030 22 40420 9.4 730 38 1040 21 40430 9.6 740 0 39 1050 20 40440 9.8 750 35 40 1060 19 40450 10 760 35 40 1070 18 40460 10.2 770 35 40 1080 17 40470 10.4 780 35 40 1090 16 40480 10.6 790 35 40 1100 15 40490 10.8 800 35 40 1110 10 40500 11 810 25 40 1120 10 40510 11.2 820 25 40 1130 10 40520 11.4 830 25 40 1140 10 40530 11.6 840 25 40 1150 10 40540 11.8 850 25 40 1160 10 40550 12 860 25 40 1170 10 40560 12 870 25 40 1180 10 40570 12 880 25 40 1190 10 40580 12 890 25 40 1200 10 40590 12 900 25 40600 12 910 25 40DEF STAN 00-23 Issue 4

©Crown Copyright 2007Copying Only as Agreed with DStanDefence Standards are Published by and Obtainable from:Defence Equipment and SupportUK Defence StandardizationKentigern House65 Brown StreetGLASGOW G2 8EXDStan HelpdeskTel 0141 224 2531/2Fax 0141 224 2503Internet e-mail enquiries@dstan.mod.ukFile ReferenceThe DStan file reference relating to work on this standard is D/DStan/21/23.Contract RequirementsWhen Defence Standards are incorporated into contracts users are responsible for their correctapplication and for complying with contractual and statutory requirements. Compliance with a DefenceStandard does not in itself confer immunity from legal obligations.Revision of Defence StandardsDefence Standards are revised as necessary by an up issue or amendment. It is important that usersof Defence Standards should ascertain that they are in possession of the latest issue or amendment.Information on all Defence Standards can be found on the DStan Website www.dstan.mod.uk,updated weekly and supplemented regularly by Standards in Defence News (SID News). Any personwho, when making use of a Defence Standard encounters an inaccuracy or ambiguity is requested tonotify UK Defence Standardization (DStan) without delay in order that the matter may be investigatedand appropriate action taken.