Category: dye transfer

dye transfer is a painted lady

Posted on Posted in A Symbol Life, dye transfer, labnotes

being, at its heart a black and white process that is, late in its game, turned to color. learning it is therefore based upon knowing black and white; and knowing that to a rather high confidence level.

a masked and painted lady of the dark

Condax Notes:

The magenta dye in use during the early 1940s was Brilliant Alizarine Light Red B. In 1945, Condax tested what he found to be a far superior dye, Brilliant Alizarine Light Red 4B, which was manufactured by Sandoz.

In September of 1954 the researchers tested a suitable yellow, Fast Light Yellow 3GX-CF, which balanced well with the standard cyan and Brilliant Alizarine Light Red 4B magenta. It exhibited superior spectral absorption, greater density in the shadows, and improved light stability (Fig. 10).119 Two months later, after a member of the research team purified the dye, Condax deemed it an ideal replacement for the standard yellow.

Erio Fast Cyanine S. as the standard cyan throughout Condax’s career 

[pylam] 

Darkroom: Standard Light

Posted on Posted in dye transfer, exs notebook, film, the Lab

NOTE: the lightbulb shown above is the light I use for making contact Azo prints. It is not an enlarger lamp. 

A standard light is the the guidance setup, or initial configuration of an exposure recommendation to match one source to another.

enlarger

Standard Light

The standard light setup will be used in making masks, and separations, in addition to other darkroom procedures such as characterizing paper and developer. In my practice  I no longer start with the guidance of the manufacturers since I’ve characterized so many films/papers for so many years I just start with my own best last information. That is usually written on tape at the enlarger, or has been set into the darkroom meters I use.

Ilford EM-10

Ilford no longer makes the EM-10. In the 90s it sold for $28. Mine still works just fine, even though I rarely use it. I have much more sensitive and accurate digital meters. Ilford provides the calibration instructions at: EM-10

Ilford Meter
EM-10

//TBD w ref link to Darkroom Tronics

280082C
300082A — note: original lit (1950s) relied upon PH211, hence no filter usedPH211 & 212
3200STANDARD CT .. NO FILTER NEEDED. dichroic standard
330081EVW
340081A decreases color temperature 200 KelvinELB & PH213
Color Temperature and Conversion