alternative harder for albumin print ?

mug

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The classic harder for Albumin print is iso-propanol 70% (Christopher James book)
I 've not iso-propanol at home . But 2 other chemicals. Can I use ? :

ROLLEI Rollei RMB Black Magic 5 Additive (Glutaraldehyde) (used for gelatine hardening )
or
TETENAL Hardener (Aluminiumsulfate , Acetic acid) (used for x-ray film hardening )

info
https://www.fotoimpex.com/photopaper/rollei-rollei-rmb-black-magic-5-additive-250-ml.html
https://www.fotoimpex.com/chemistry...-added-to-the-fixer-or-stop-bath-1000-ml.html
 

tezzasmall

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I use VERY few grains at a time, of Chrome Alum, as a hardener when I use liquid emulsion.

NOTE: It has many various names as well as above, but you are looking for a purple crystal and not, as far as I know of its uses, white alum crystals, which are used in pickling vegetables.

I found it cheap and easy to get on ebay.co.uk

There is a good description of it on this link:

https://www.sciencecompany.com/Chromium-Potassium-Sulfate-500g-P16217.aspx

Terry S
 

ced

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Fix. Add 200g Sodium Thiosulphate (anhydrous) to 1L of distilled water to make a simple fixing bath. This is plain fixer...
 

nmp

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Rubbing alcohol not easily available in Netherlands? I would try to get that before experimenting with the others.
 

NedL

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nmp said:
Rubbing alcohol not easily available in Netherlands? I would try to get that before experimenting with the others.
Click to expand...
+1 If you are going to the time and trouble to double coat albumen, get some rubbing alcohol!

I think sometimes the paper was steamed, which essentially cooks the albumen to harden it... you might be able to find old instructions for that somewhere.... but I think you should find some rubbing alcohol.
 
OP
OP

mug

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Thank you for your reactions. May be iso-propanol is best to order. It is not expensive and easy available online, but takes 2 days before I have package at my home.
The other 2 products I had already on the shelf here at home, they are perfect for gelatine emulsions. I'am a starter with albumin, So I ask here the question on this forum
 

nmp

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With the free advice (worth every penny,) we require that you share the results of your efforts....
 
OP
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mug

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share the results . . .
Here my first result (I still needs to learn a lot !) . 4 minutes UV light
 
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