Re: Chrysotypes and humidity

["Breukel, C" <cor@lumc.nl>]

Lukas Werth wrote:

Lukas,

Thanks for below suggestion, I assume that bringing a coated Chrysotype
to the desired humidity for upto 1 hr hasn't any negative effects on the
coated paper (I could imagine "precipitation" of the gold, since the
ligand (TDPA)-gold complex is said to be instable)?

And what volume of solutions do you put in these trays?,

Thanks,

Cor

> Cor,
> 
> I have cat litter trays with saturated solutions in them for humidity
> control. Ammonium chloride for 85%, calcium nitrate for 65%, calcium
> chloride in powder form ca. 10%, in sat. sol. ca. 40-50%(?), all ideally 20
> C, which means for me room temperature. The paper is taped on the lid (a
> laminated fiber sheet). I usually dry the paper first over calcium chloride
> powder, and then bring it to the desired humidity over the other solution
> (over each between 1/2 h and 1 h).
> 
> Lukas