Hi sparkle,
Sodium Formaldehyde Sulfoxylate is the standard discharge chemical for
wool (and silk), but be careful, it is highly toxic!
Formosul: Sodium formaldehyde sulfoxylate.
"It is the preferred discharge for silk and wool which requires
steaming. Good ventilation is mandatory as is the use of a respirator
with Acid Gas cartridges."
http://www.prochemical.com/glossary.htm
Discharge:
"The process of removing color from a fabric in a controlled manner.
It usually leaves a white or differently colored pattern behind.
Discharge chemicals are usually very caustic and should be used in
areas with good ventilation."
http://www.dharmatrading.com/html/eng/467953-AA.shtml
DISCHARGE PRINTING (making designs)
Ingredients:
Formosul [Sodium Formaldehyde Sulfoxylate]
Acetic Acid 56%
Thickening Paste
Steps:
1) Mix the thickener paste.
2) Add the paste to the Formosul.
3) Apply paste to the fabric.
4) Let paste dry.
5) Steam for 10 to 15 minutes.
6) Rinse well and wash hot with Synthrapol
7) Dry
You will find instructions/formulas at the following Prochemical
website (copyright restraints keep me from pasting them here for you):
http://www.prochemical.com/directions/Formosul.htm
If you prefer to make your own thickener, you will find
instructions/formulas at the following Dye Man website.
Printing thickeners instructions/formulas:
"Best way to make a thickened dye solution is to first dissolve dye in
water, than use this solution to make the thickener paste."
http://www.dyeman.com/chemical.html
IMMERSION DISCHARGE (dunking the lot)
Stripping Acid Dyes From Wool...recipe for 500 grams of fabric:
"Remember that not all Acid Dyes can be stripped, so experimentation is necessary."
http://www.dyeman.com/discharge.pdf
Immersion discharge on one pound (454 gm) of wool or silk:
http://www.prochemical.com/directions/Formosul.htm
SUPPLIES
Fabrics to Dye For: Dry Auxiliaries for fabric dyeing and discharging:
Fabrics To Dye For
Westerly RI US
http://www.fabricstodyefor.com/fabric_art_supplies/dyes/auxiliaries.html
Common Threads: Auxilliary Supplies:
Common Threads
Encinitas CA US
http://www.fiberartshop.com/dyepr.htm
George Weil Catalogue:
George Weil
Surrey UK
http://www.georgeweil.co.uk/pdf/synthetic_dyes.pdf
Formosul (Rongalit) sodium formaldehyde sulfoxylate:
Dye Man
Coogee Australia
http://www.dyeman.com/chemical.html
WARNING: THIOUREA DIOXIDE:
Not for use on wool but rather on cellulose fibers (of vegetable origin).
Additional Link:
Bleaching Wool using Hydrogen Peroxide
http://www.prochemical.com/directions/BleachingWool.htm
I hope this helps. If you have any questions, please post a
clarification request before rating my answer.
Thank you,
hummer
Google Search Terms Used:
Formosul wool
Rongalit wool
"discharge printing" wool "thickener paste"
wool discharge formula |
Request for Answer Clarification by
sparkle1-ga
on
30 Nov 2003 20:36 PST
Hi hummer,
thank you for this information. Could you please supply the formula
for the thickening paste, as I can't seem to find it in the
information or links that you have supplied (This means the
percentage, type and amount of
chemicals used).
eg in your response:
Ingredients:
Formosul [Sodium Formaldehyde Sulfoxylate]
Acetic Acid 56%
Thickening Paste...
If you prefer to make your own thickener, you will ...
Also, some of the links were very interesting but only supplied a
description of the process, which we are already familiar with.
Thank you again for your assistance,
sparkle1
|
Clarification of Answer by
hummer-ga
on
01 Dec 2003 07:55 PST
Hi sparkle1, thank you for your clarification. Sorry, I believe
"formula" was the wrong word to use in regards to thickener. Sodium
Alginate (kelp) is the standard product used as a thickener - both Low
(for wool & silk) and High (for cotton) Viscosity Sodium Alginate are
available.
1) Briefly, here is what you will need for making one quart of discharging paste:
---------------------------
Neutral Formula (wool, silk & nylon)
95oF (35oC) water: ...............................1½ cups (375 ml)
Formosul (Sodium Formaldehyde Sulfoxylate): ......10 Tbl (150 gm)
http://www.prochemical.com/directions/Formosul.htm
To the above formula, you will gradually sprinkle enough LV Sodium
Alginate to thicken to the desired consistency (Sodium Alginate is
readily cold water soluable). Alternatively, you can make a paste of
the Sodium Alginate and add that to the formula to help prevent lumps.
Directions will be on the bag.
"Sprinkle the thickener into the chemical water slowly, mixing
continuously. (You can also use a blender). Let sit for an hour or so
to thicken before use. Refrigerate to store. Don't over-thicken,
thinner is better."
http://www.dharmatrading.com/html/eng/2008-AA.shtml
---------------------------
2) Following are informative links explaining Sodium Alginate:
"Low viscosity, high solids sodium alginate thickener for all reactive
dyes. Primarily used for silk, wool & synthetic fabrics when fine line
definition is important."
http://www.prochemical.com/glossary.htm
Sodium Alginate-Low Viscosity
"High solids sodium alginate thickener for all reactive dyes.
Primarily used for silk, wool & synthetic fabrics when fine line
definition is important. It makes it easier to stamp, paint and
stencil with thin dyes and paints."
http://www.dharmatrading.com/glossary/S.html
Sodium Aginate Properties:
http://www.chemicalland21.com/arokorhi/lifescience/foco/SODIUM%20ALGINATE.htm
3) Two suppliers of Sodium Aginate:
Dharma Trading:
"Sodium Alginate is pure kelp (sea weed) - it's commonly used to
thicken food. It is the recommended thickener for Procion dyes and it
works as a thickener for other liquids as well."
#SA1 1 lb. Low Viscosity for silk (LV) 11.50
http://www.dharmatrading.com/html/eng/2008-AA.shtml
PRO Thick F:
"Low viscosity, high solids Sodium Alginate thickener for all reactive
dyes. Primarily used for silk, wool & synthetic fabrics when fine line
definition is of importance." 1 lb. $11.25
http://www.fabricstodyefor.com/fabric_art_supplies/dyes/auxiliaries.html
4) Additional Link (of interest):
"For those of you who asked for my recipe for printing and direct
application of Fiber Reactive Dyes on wool -- NO steaming required:
Print Paste:
1 1/2 Cups Urea
3t. Sodium Bisulfite
1t. Calgon
2t. vinegar
4-8t. sodium alginate (depending on thickness desired)
Warm water to make 1 Qt.
Put dry chemicals in a jar and add warm water and vinegar. Cover and
shake vigorously to mix. Label and store in refridgerator."
http://groups.yahoo.com/group/NaturalDyes/interrupt?st=2&m=1&done=%2Fgroup%2FNaturalDyes%2Fmessage%2F720%3Fsource%3D1
I'm sorry if you found my answer a bit confusing. In regards to your
comment, "Also, some of the links were very interesting but only
supplied a description of the process, which we are already familiar
with.", I did add some links that I believed you would find
interesting, such as suppliers of Formosul, rather than just supply
you with the formula and nothing more.
I hope this has helped to clarify my answer but if you have any more
questions, please do not hesitate to ask.
Sincerely,
hummer
|
Request for Answer Clarification by
sparkle1-ga
on
01 Dec 2003 15:13 PST
Hello hummer,
thank you so much for this information. Very helpful. If I need any
more information I will post another question & fee.
Regards,
Sparkle1
|
Clarification of Answer by
hummer-ga
on
01 Dec 2003 16:41 PST
Dear Sparkle1,
Thank you so much for everything, I'm glad we were finally able to
sort it all out. I found the topic very interesting and am grateful
you and I went back to have another look at the kelp - most
interesting indeed! In another life, we kept a small flock of sheep
but never dreamed one could dye the wool and then discharge it to make
a design - how clever. I hope all goes well for you - I'd love to see
a photo of the finished product if you think of it.
Sincerely,
hummer
|
Request for Answer Clarification by
sparkle1-ga
on
01 Dec 2003 17:39 PST
It may be a while before I can get a photo - how do I email it to you?
|
Clarification of Answer by
hummer-ga
on
02 Dec 2003 07:58 PST
Hi sparkle1.
Reasearchers aren't permitted to post their email addresses but you
would be able to upload your photo to an online website and post me
the link to it.
You can make a list of online photo albums using your own parameters here:
http://www.andromeda.com/people/ddyer/photo/albums.html
Shutterfly is one that's free:
http://www.shutterfly.com/home/pro5_newuser.jsp?cid=XXXHOMEP7TA
hummer
|
,
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