[Alt-photo] Re: Argyrotype on Fabriano Artistico Extra White Soft Press 300gsm (140lb)

[Loris Medici]

Hi all,

This is just for the records; I managed to get smooth Argyrotype test
prints on FAEW/SP (de-alkalized with sulfamic acid), which have good dmax
and won't show any bronzing or unevenness to the naked eye.

See my working parameters below:
(These may help as a starting point for some of you...)
- 2+1 diluted sensitizer
- 0.25ml coating solution per 10 sq. in. (brush coating)
- 2 drops 10% Tween 20 per ml of coating solution
- Drying time: 60 minutes @ 23C / 50% RH
- Gold-thiourea toning

See the result here:
http://www.flickr.com/photos/loris-medici/8757864351/

That's all from my part, I'll continue to the calibration and do my first
real print on this paper in a couple of days. Done with testing / tech
talk, lots of printing from now on...

Regards,
Loris.



2013/5/18 Loris Medici <mail at loris.medici.name>

> Hi Marek,
>
> FAEW/SP is pretty hard surfaced, I'm still trying to find the best
> combination of diluted sensitizer volume per given area and Tween strength
> per given sensitizer volume. I'm still not there but I'm pretty close; my
> benchmark is pop Pd on the same paper. (A pretty high criterion!) The
> results are way better than single coated Vandyke but not as good as I
> would like them to be... I'm going to increase both the coating volume and
> drying time; I see occasional unevenness / bronzing in the prints. That
> could be due both (a.) insufficent coating volume and (b.) unsufficent
> drying time. (I'm going to try 0.25ml diluted sensitizer per 10 sq. in. and
> a drying time of min. 60 minutes later today - I was working with 0.20ml/
> 10sq.in. and 40 minutes before...)
>
> Regards,
> Loris.
>
>
> 2013/5/18 Marek Matusz <marekmatusz at hotmail.com>
>
>> Loris,
>>
>> I noticed that when I put the files in the same folder for upload. SO I
>> took both prints and examined them side by side. The print on Fabriano SF
>> is indeed somewhat  lighter, perhaps half the step. I think that the
>> contrast is lower then the print of Rising Stonenge.
>>
>> On a separate note. Does anybody know what is the shelf life of coated
>> argyrotype papers? The chemistry seems to be pretty stable.
>>
>> Marek
>>
>