some good ones--at last

d paul · Post by **d paul** » Thu Jul 19, 2007 12:06 am

Hi everyone

I have finally shot some good holograms

this is a home made silver halide plate

20 sec exposure

6 min development with gp-2 diluted 15ml to 200ml,plus 10 drops 6% ammonium thiocyanate

Then 3min each 70 and 99% IPA(it dosen't photo too well)

This is a MBDCG plate,made to the HoloWiki article formula

10 min exposure

soak water @ 26deg cent

3min each in 70 and 99% IPA

Both were shot with a polarized 20mw hene

I also used windshield repair acrylic to seal both holos--works really well

rob

dave battin · Post by **dave battin** » Thu Jul 19, 2007 12:24 am

Congratulations and nice holos Rob, job well done! You are off to a flying start!

Colin Kaminski · Post by **Colin Kaminski** » Thu Jul 19, 2007 12:45 am

Very nice! I can not tell from the pictures are the edges milky? Any thing that looks milky is water.

d paul · Post by **d paul** » Thu Jul 19, 2007 11:01 am

Colin Kaminski wrote:Very nice! I can not tell from the pictures are the edges milky? Any thing that looks milky is water.

The silver one is a bit under exposed, but the MBDCG one is milky .

I thought it was becuse I used too high a temp for the 1min soak.

rob

Hans · Post by **Hans** » Thu Jul 19, 2007 1:13 pm

but the MBDCG one is milky .
I thought it was because I used too high a temp for the 1min soak.

Yes, underexposure or too high temperature in the water bath causes milk.

Did you use the original MBDCG formula (the one with Acetic Acid), or the adapted one (with Boric Acid)?

d paul · Post by **d paul** » Fri Jul 20, 2007 7:45 pm

Dear Hans

I used the adapted formula,with boric acid. The plates are good for two days,and then the emulsion breaks up like shaved plastic when you dry it.

rob