How to make "Vertigris"; You had to ask!!

BDeTar@AOL.COM BDeTar@AOL.COM
Thu, 20 May 1999 22:27:00 EDT


In a message dated 5/20/99 3:21:48 PM Pacific Daylight Time, 
rockymtn@sprynet.com writes:

<< I have a neighbor who is going crazy trying to find . . . are you ready for
 this .. . . Verdigris!
 
 She has an old fashioned metal lamp post for her front yard.  She wants it
 to look like it has verdigris.
 
 She's exhausted the hardware and home store and craft store circuit . . . . 
>>

Glen, 

What kind of metal is the lamppost made of?  If it's steel, paint works 
great! LOL!

All seriousness aside, Here's a quick "How to" on coloring metals from "The 
Complete Metalsmith" by Tim McCreight:

METALS
Brass
	Variegated green film: #3, 6
	Flat pale green: #5
	Deep blue to purple to gray: #7

Bronze
	Variegated green film: #3, 6
	Scarlet to blue to brown to gray: #2, 7
	Rich brown to blue: #4
	Dark gray: #5

Copper
	Deep purple to blue to brown to black: #1
	Brilliant scarlet to blue to violet: #2, 7
	Green film: # 6
	Rich brown to blue: #4
	Flat sea green: #5
	Rich blue to purple to gray: #7

SOLUTIONS

#1
Dissolve a small amount of Liver of Sulfur in warm water.  A pea-sized piece 
to a cup of water is usual.  A trace amount of ammonia added to the solution 
will brighten the colors.  If the solution is too strong, the resulting 
sulfide layer is brittle and will be easily chipped off.  The solution may be 
warmed, but do not boil.  Solution may be brushed on, or work may be 
immersed.  The dip-rinse-brush method is recommended to slowly create a wide 
range of colors.

#2
Dissolve a pinch of Barium Sulfide in a cup of water.  Brush or immerse in 
solution.

#3
1 part Ammonium Chloride
6 parts Copper Sulfate
60 parts water
Dissolve all ingredients together.  Apply solution to metal and allow it to 
dry.  Repeat several layers, allowing each to dry.  Scratch brushing will 
alter the colors.

#4
1 part Lead Acetate
1 part Acetic Acid
2 parts Sodium Thiosulfate
6 parts water
Dissolve all ingredients together.  Apply solution to metal and allow it to 
dry.  Repeat several layers, allowing each to dry.  Scratch brushing will 
alter the colors.

#5
1 part Zinc Chloride
2 parts Acetic Acid
4 parts Ammonium Chloride
4 parts Table Salt
8 parts Copper Sulfate
60 parts water
Dissolve all ingredients together.  Brush on or immerse.

#6
Under a box, set a bowl of water and a second bowl of VERY DILUTED 
Hydrochloric Acid or undiluted vinegar.  Drop bits of chalk into the acid or 
vinegar.  Suspend work in the resultant Calcium Carbonate environment.  This 
method can take several days to produce a color.

#7
Birchwood Casey Gun Blue.  This commercial preparation is available at most 
sporting goods stores or write: Birchwood Casey Co.  Eden Prairie, MN  55344. 
 Use solution full strength by brushing onto or immersing work.

Hope this is more than you wanted!  Have fun!

Brian De Tar, RPT
Portland, OR
BDeTar@aol.com
	NO OBSTACLES... ONLY OPPORTUNITIES!



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