For the end user of the pale latex crepe i found : "France Neir" ; for the moment.
For the Dyes i found : "Coger". Thank you for "Sigma". I will have a look.
In the book of B.Lavédrine, all the process for dying the patatoe starch is explained.
For the panchromatic emulsion i found a photograph who is ready to send me a litlle bit of this emulsion...if i resolve all the problems before.
Here i found this:

http://glsmyth.com/AltProcess/Articles/DyeTransfer.htm

This is all for the moment.

Shaz