DUSRT RCP20 + TETENAL RA4RT

Gaslight123 · Apr 6, 2021

Hi everyone !

Sorry my english is not the best.
I just bought a Durst rcp20 and I would like to know how do you use your chemistry.

So I load 2,5l of D, 2,5l of B and some water in the middle. I suppose I'm gonna do about 10 prints and test strip per session.
Can I re-use the same mix let say a few days after?

Thank you !

btaylor · Apr 6, 2021

Yes, if you store the solutions in containers with out air between sessions. If memory serves, you replenish at a rate of 10ml per 8x10” surface area. I run a bunch of prints and when I drain the chemicals back into their containers. I do the replenishment at that time- so I am ready for the next session. The chemistry lasts quite awhile. Also, in a RA4 roller transport machine I would run developer, blix and the water bath at the end.
It is very economical.

nickandre · Apr 6, 2021

IIRC what you're supposed to do is:

Developer
Blix
Washless stabilizier

That way you don't need to wash after. RA4 doesn't ordinarily require a stop bath (although you can use one if you run into problems).

Gaslight123 · Apr 6, 2021

Thank you for those answer is super helpful !!

nickandre · Apr 6, 2021

Gaslight123 said:
Thank you for those answer is super helpful !!

Just double check how much you have to replenish the "washless stablizer" as if it gets weak you'll presumably have print problems.

Personally I'll just use water since I live in a veritable swamp.

DREW WILEY · Apr 6, 2021

I believe in a good washing after the final blix. It does make a difference in print longevity. And I never re-use chemistry on a different day. If you do that, like for a roller-transport processor, you need to properly replenish it.

Gaslight123 · Apr 7, 2021

Yes a good wash will be necessary at the end.
So if I do a replenish at let say 1/3 of D and V it will be ok?

DUSRT RCP20 + TETENAL RA4RT

Gaslight123

btaylor

nickandre

Gaslight123

nickandre

DREW WILEY

Gaslight123

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