Previous surmises are correct:

....   test conditions of the materials: temperature, relative humidity,
testing time (duration). For example, ...
C-96/35/90 ... means a treatment for 96 h at 35 C and at 90% RH) or test
cond

http://www.esmat.esa.int/Publications/Published_papers/04265761.pdf

IEEE TRANSACTIONS ON ELECTRONICS PACKAGING MANUFACTURING, VOL. 30, NO. 2,
APRIL 2007 Fig. 1. Experimental setup for humidity and temperature
conditioning tests

Fig 1 p116 shows a test setup

__________________________________

Test procedures here in book preview:

Looks quite apposite

https://books.google.co.nz/books?id=3Dv_FCFUEXsbMC&pg=3DPA303&lpg=3DPA303&d=
q=3Dmeaning+of+%22C+-+96+/+35+/+90%22&source=3Dbl&ots=3D7dvi5pz4kY&sig=3DAC=
fU3U2azuxTtarkmqhymJhUox4OBEACMQ&hl=3Den&sa=3DX&ved=3D2ahUKEwjd7vOH1NXhAhWE=
eisKHRYuDxsQ6AEwBHoECCcQAQ#v=3Donepage&q=3Dmeaning%20of%20%22C%20-%2096%20%=
2F%2035%20%2F%2090%22&f=3Dfalse



_________________________

Not strictly (or even) related but diagrams may prove useful in due course

http://www.hitachi-chem.co.jp/english/products/bm/files/mcl_e_700g.pdf

http://www.hitachi-chem.co.jp/english/products/bm/files/mcl_e_67w.pdf

______________________

Laminate Specs of possible interest (or not)


http://www.benmayor.com/usuaris/consumibles_adicional/arxius/66_19_5_Catalo=
goTaiwanLeader.pdf

https://industrial.panasonic.com/content/data/EM/PDF/ipcdatasheet_1706_R-17=
55D.pdf


http://www.agssales.com/is620i_e_6.pdf



        Russell


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