ADOX COLLOIDA PHOTOGELATIN

ADOX Fotoimpex

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We now have two versions of ADOX COLLOIDA photogelatin.

One is the product which has been out for almost two decades now: A photographic coating gelatin in order to make an under- or overcoat in the work with liquid emulsions. This is now called ADOX COLLOIDA "R".

Next to this known product we now have a true precipitation gelatin (Ansatzgelatine) to make film or paper emulsions.

This is called ADOX COLLOIDA "P".

We placed them in different sections in the webshop but I wanted to announce this here as well so everyone knows which is the right product for him/her.

If you own a bottle of COLLOIDA without "P" or "R" it is coating gelatin!

Best regards,

Mirko
 

AgX

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I guess "P" stands for precipitation but what is the meaning of the "R"?
 
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ADOX Fotoimpex

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AgX said:
I guess "P" stands for precipitation but what is the meaning of the "R"?
Click to expand...

In this case "R" as in "Regular". Could have been "S" for supercoating or "U" for undercoat or a simple "C" for coating.
"C" would have probably been a good choice as well but now the labels are printed ;-)

Mirko
 
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JOSarff

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Mirko:

Do you have a distributer in Canada? Thanks

Joe
 

Jerevan

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So - what does this mean, in practice? That the "R" version is useless for making emulsions? How does a precipitation gelatine differ? Higher/lower bloom, or other things that differ?
 
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ADOX Fotoimpex

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Jerevan said:
So - what does this mean, in practice? That the "R" version is useless for making emulsions? How does a precipitation gelatine differ? Higher/lower bloom, or other things that differ?
Click to expand...

You can use it for precipitation but if you want consistant results you should choose the precipitation version. Basically P is the selction from the selection. The purest batches which have a narrower difference in bloom index get chosen as precipitation gelatin whilst the specs are not so strict for coating gelatin.
I think the bloom index is also shifted a bit because from the coating gelatin usually the top layer is manufactured which is on one end of the viscosity bandwidth of a coating package. But this can also be adjusted by other means. I don´t really know this last point for sure.

I am sorry for the late reply but I didn´t know this thread had developed later on.

Mirko
 

Jerevan

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Thank you Mirko for the answer.
 

chrisaisenbrey

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Hello Philippe,

As far as I understand the ADOX COLLOIDA P is cleaner. For reproducible silver gelatin emulsion making this is important since the emulsion reacts very sensitive to impurities. And you want to add the "impurities" yourself in a controlled manner.

For carbon printing this is not so important. More important is the “strength” of the gelatin. I get my gelatin from:

Dead Link Removed



By the way congratulations to your color carbon print!

Chris
 
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