Search found 8 matches

by PRATHEEP
Sat Oct 29, 2022 2:52 am
Forum: AgX
Topic: silver halide emulsion preparation stabilizers, antifoggants, anti-bacterial preservatives
Replies: 0
Views: 8631

silver halide emulsion preparation stabilizers, antifoggants, anti-bacterial preservatives

Any one provide me the exact chemical name of stabilizers, antifoggants and anti-bacterial preservatives for silver halide emulsion preparation
by PRATHEEP
Sat Jun 18, 2022 2:06 am
Forum: AgX
Topic: silver halide emulsion preparation
Replies: 8
Views: 7871

Re: silver halide characterization

At which stage of emulsion we would take TEM study to find grain size ??? I mean before adding of dye and hardener (jelly state)?? or after added dye and hardener (liquid state)?? or after emulsion coated on glass substrate ( before exposed)??? or after recording ??? The thing is I want to know the ...
by PRATHEEP
Mon Dec 06, 2021 12:20 am
Forum: AgX
Topic: silver halide emulsion preparation
Replies: 8
Views: 7871

Re: silver halide emulsion preparation

washing is done with the same , its alright now ... but the main drawback "sensitivity" is very low …. how can I improve the spectral sensitivity?
by PRATHEEP
Fri Dec 03, 2021 8:45 am
Forum: AgX
Topic: emulsion thickness
Replies: 17
Views: 10807

emulsion thickness

how to find emulsion thickness? please suggest me a good low cost testing any..
by PRATHEEP
Fri Dec 03, 2021 8:41 am
Forum: AgX
Topic: silver halide emulsion preparation
Replies: 8
Views: 7871

silver halide emulsion preparation

what are the effective washing methods for 0.5 and 3 % gelatin concentrated silver halide emulsion? and also how to improve the spectral sensitivity of the silver halide emulsion for 632.8 laser?
by PRATHEEP
Tue Aug 24, 2021 4:57 am
Forum: AgX
Topic: silver halide+ dye
Replies: 2
Views: 3841

Re: silver halide+ dye

3-carboxymethyl-3',9-diethyl-5,5'-dimethylthiacarbocyanine betain dye is not matched in ORGANICA
by PRATHEEP
Sat Aug 14, 2021 6:50 am
Forum: AgX
Topic: silver halide+ dye
Replies: 2
Views: 3841

silver halide+ dye

Does any one know of any suitable dyes other then Pinacyanol to sensitize silver halide emulsion to red laser 632.8 nm ?
by PRATHEEP
Thu Oct 01, 2020 1:40 am
Forum: DCG
Topic: pre-fix wash?
Replies: 4
Views: 7926

Re: pre-fix wash?

how can we maintain 50 degree temperature in dedicator?
during the dcg process meta bi sulfate best or thio sulfate best?