Thursday, January 13, 2011

SEM layer of T55 receiver

This cross section view of the T55 receiver is wonderful.  John Chervinsky supplied this along with several other very informative SEM (scanning electron microscope) images.

You are looking at the inside of the receiver. On the right is space, the top layer is a very thin layer of a substance like gum arabic. Under that is a colloidal silica layer (or sodium silicate) with nucleating particles in it. These appear to be palladium.  Below that is the white baryta layer.  Good stuff! Thanks John.

Look at John's fantastic work, here.


Anonymous said...

If one would like to try some DTR experiments by oneself, from where would it be possible to get the receiving paper?

Bob Crowley said...

You can used fixed out photo paper. It works fairly well. All you need to do is place undeveloped print paper in fixer for a while, and then wash it. That will give you a sepia positive like the earliest Polaroids. Another way to go about this is to reclaim some receiver paper from old film packs that are no good.

Anonymous said...

Excellent! I thought about the film packs, but longer strips work better for my plans. Thank you ever so much. This is excellent news. I was starting to think I had to start looking for old roll film from which I could take the positive paper.

By the by, have you ever considered starting production of roll film? Perhaps the New42 Project? My Land 150 hungers to take some pictures ;).

Bob Crowley said...

That will never happen, unless you do it.