Re: gum mixes
1. premixed gum: never
2. 300 grams (lumps in cheescloth) plus 1 liter water
Recently I purchased a cheap winemakers hydrometer: http://urltea.com/2f4x
It has no baumé scale but degrees baumé can be calculated from the
specific gravity scale. Here's a calculator: http://www.ilpi.com/msds/ref/baumescale.html
, somewhere I found one the other way round too but I don't have the
url at this moment.
Measured my gum and found it was exactly 14 baumé.
Sentisizer: saturated potassium dichromate in a 1:1 mix for all layers
On 23 dec 2007, at 19:18, Christina Z. Anderson wrote:
I'm finishing my section on gum thicknesses, and was wondering a
question or two of all one-time to inveterate gum printers:
1. How many of you are using premixed gum?
2. If not and you are mixing your own, what dilution are you
mixing it at exactly--weight of gum into what volume of water, for
instance? If it is 300g in a TOTAL volume of 1 liter, or 300g PLUS
one liter please differentiate clearly. If, mixing more than one
solution, also state. If not using gum/pigment 1:1 sensitizer at
time of use please note.
Any other practices, I'd love to hear--e.g. using a hydrometer or
some such thing. Or if you use dry gum at time of use in your
sensitized mix and do not premix a gum solution. Stuff like that.
I've got the timeline almost finished on gum dilutions from
beginning til now and I want the "now" as in 2007. Hopefully this
isn't too pointless, misleading, and confusing!
Christina Z. Anderson
Photo Option Coordinator
Montana State University
Bozeman, MT 59717
- gum mixes
- From: "Christina Z. Anderson" <firstname.lastname@example.org>