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1950s Paint Specifications

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  • Robert Edward
    Rank 5 Registered User
    • Apr 2008
    • 151

    1950s Paint Specifications

    Please could someone assist with a question relating to paint specifications on a drawing for finishing a glider?

    The drawing shows 2 references for each of the paints, one is a DTD Number, which is believed to be related to the Ministry of Supply. The second is a 33B number, for example yellow (roundels and trainer stripes) is 33B/965, 700 or 701.

    Does anyone recognise these 33B numbers, could they be Slingsby related? Is there a cross reference list to NATO equivalents?

    Any thoughts or suggestions would be gratefully received.

    Thanks in advance,

    Robert.

  • antoni
    Rank 5 Registered User
    • Dec 2005
    • 702

    #2
    The DTD number is the material specification, the type of paint. The 33B ref is for a colour, material specifaction and container size.

    33B/700 - Yellow, DTD 751 - 754, 1 gal
    33B/701 - Yellow, DTD 751 - 754, 5 gal. *

    * Typo now corrected
    Last edited by antoni; 14th June 2019, 10:53.

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    • John Aeroclub
      Rank 5 Registered User
      • Jul 2006
      • 2761

      #3
      To add a little to Antoni's post the 33B numbers are RAF stores reference numbers.

      John

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      • aircraftclocks
        Rank 5 Registered User
        • Sep 2006
        • 312

        #4
        DTD 751 Aeroplane doping scheme of low tautness
        DTD 752 Aeroplane doping scheme of medium tautness
        DTD 753 Aeroplane doping scheme of high tautness
        DTD 754 Cellulose finishes and primer

        DTD 754 states that the cellulose finishes supplied to this specification shall be of the same formulation as those of the same colour supplied by the same manufacturer to specifications D.T.D. 751, D.T.D. 752 and D.T.D. 753.

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        • Robert Edward
          Rank 5 Registered User
          • Apr 2008
          • 151

          #5
          Thanks very much for the information, is there away of linking a 33B number to colour spec, such as as BS381C?

          Comment

          • DaveF68
            Rank 5 Registered User
            • Jun 2004
            • 1784

            #6
            Originally posted by Robert Edward View Post
            Thanks very much for the information, is there away of linking a 33B number to colour spec, such as as BS381C?
            They were MAP/MoS colours - incorporated into BS381C in the mid 60s. I don't think (WW2 trainer) yellow was one of them. It also depends which Yellow was 33B/700 - the original wartime one was MoS Colour no 2, there was a later one introduced in the mid 50s (405) which had less of an orange hue and was closer to BS381C 356 Golden yellow

            I have an FS595 equivalent for the WW2 version as 33538

            Comment

            • radarsdesk
              Rank 5 Registered User
              • Apr 2007
              • 202

              #7
              Feb 1958 AP1086 Section 33B doesn't add anything regarding the colour for 33B/701 and I would suspect that the difference between 33B/700 and 701 was the quantity it was supplied in, please see attached extract from Section 33B. It's entirely possible that 33B/700 had been re-referenced by this issue of AP1086

              Regards
              Dave

              www.dsgaviation.co.uk

              Comment

              • antoni
                Rank 5 Registered User
                • Dec 2005
                • 702

                #8
                Colour standards were kept by/obtained from the DTD up to 1946 when they became a supplement to BSS 381. In 1964 they were included in BS 381C but only those colours still in use were included. Grey Green first appears in the 1948 revision of BS 381C.

                Yellow is more complicated. It was used from 1937 until 1947 and included in the MoS colour frange as Aircraft Finish No 2. It had an orange cast which seems to have been lost from the later high gloss yellow Aircraft Finish No 405 from the mid-1950s. Neither of these colours were included in BS381C perhaps because Aircraft Finish 405 was so similar to BS 381C Golden Yellow to make the inclusion pointless.

                If you want to find out more then "Camouflage and Markings No1 RAF Fighters 1945 - 1950 UK Based" author Paul Lucas is good place to start. I think it is still available from Guidline Publications.

                Edit. It is:

                https://www.guidelinepublications.co...DN=&RNZ=920868
                Last edited by antoni; 14th June 2019, 11:29.

                Comment

                • Robert Edward
                  Rank 5 Registered User
                  • Apr 2008
                  • 151

                  #9
                  Thank you all for the information so far, Dave, would it be possible to have a scan of the full 33B section?

                  Thank you very much in advance,

                  Robert.

                  Comment

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