Homemade HC-110 analog

[bnxvs]

Trying to preparation of a concentrate similar to HC-110 (new 2019 version)

BnxVS Prepare two separate solutions for 200 ml of concentrate. Solution A (sulfite): Potassium hydroxide ... 14g Potassium metabisulfite ... 28g * Water ... up to 75ml (stir until completely dissolved) Solution B (developing agents) Ethylene glycol (antifreeze, propylene glycol, etc.) ...

telegra.ph

It's also known as "KGB-20" in runet )))

 

[Alan Johnson]

For comparison the MSDS of the original and later HC-110 are given in post 27 here:

New HC-110 Formula

Any thoughts on the new formula's keeping properties? One of the features that I have always liked about HC 110 has been it's keeping property. This is a radical reformulation. The fingerprint technology of HC-110 -- the use of a DEA-sulfur addition product (originally patented by Kodak...

www.photrio.com

IIRC there is an even newer version [made by Sinopromise?] that has the sulfur dioxide diethanolamine adduct of the original.
The concentrate as prepared in the post above seems to be similar to the later HC-110 in post 27.

 

[bnxvs]

For comparison the MSDS of the original and later HC-110 are given in post 27 here:

New HC-110 Formula

Any thoughts on the new formula's keeping properties? One of the features that I have always liked about HC 110 has been it's keeping property. This is a radical reformulation. The fingerprint technology of HC-110 -- the use of a DEA-sulfur addition product (originally patented by Kodak...

www.photrio.com

IIRC there is an even newer version [made by Sinopromise?] that had the sulfur dioxide diethanolamine adduct of the original.
The concentrate as prepared in the post above seems to be similar to the later HC-110 in post 27.

Yep! That's what the title of the post says - the 2019 version ))

p.s. By the way, the recipe itself was created in 2020. And the concentrate survived storage well for a year or more with the people who tested it.