making compo 101

[eloid]

I hope someone can help me... newbie

Im look for the recipe and ingredients to to make compo

[Baer Charlton]

100lbs Stone dust
50lbs Molasses
25lbs Hide glue granuals
throw and a half of whiting
1/2C urine (your will work as long as it's alcohol and drug free)
1/4C vinegar

Heat untill doughy and turn out and knead untill elastic.

Form immediately before it cools

Use all formed compo with in the week or freeze for up to a year in vacuum pack sealed pouches


Or somewhere about like that...

I do know that trying to make it in small 20lb batches doesn't work.

Strongly suggest calling Ed at Bomar.:thumbsup:

[josephforthill]

Unless you are doing a major or long term activity with this, it would probably be easier to purchase some fresh compo from Bomar, as Baer suggested. It's been a while since I ordered some, but I seem to recall it being sold in 5 lb. quantities.

If you still want to pursue this, I can go hunt up my recipes for you.

Joseph

[JFeig]

I agree with everyone - to buy a small quanity from a supplier.

With that said:

30gm RSG
150gm Hide glue
220ml water ------ soak and warm to melt

90 gm crushed rosin
2 gm balsam pitch
1/2t venice terp
80ml boiled linseed oil ----- melt in double boiler

1kg whitting --- mix with glue and rosin

per Gold Leaf Studio's - Washington DC

[Terry Hart cpf]

Could I ask what you would do with it? If you are thinking of making ornaments you would also need molds. Not so easy to press I think. It's nice for patching & repairs in some cases though.
Recipe from Roger Nielsen & Sue Davis, PFM, June 1995
Ingedients
130ml water
45gm rosin
40gm boiled linseed oil
75gm ground or pearl hide glue
15gm rabbit skin glue
550 gm whitting
Procedure: Well, if you're really interested and don't have a copy of the magazine or know someone who does contact picture Framing Magazine For the article "Your Own Compo Recipe & Sources For Others" June !995 p.38
or, like they said, Bomar Designs (913) 837-3202. They do have a $10 handling charge on orders under $50.

[Terry Hart cpf]

PS, If you decide to use Baers recipe you'll probably want the garlic & urine mordant recipee too when you go to gild. Just let us know.

[Baer Charlton]

Terry, I was saving that recipe for the next Grumbler's Cook Book. Yummo!:help:

BTW: "THAT" book is on my nightstand.... and the wife finally picked it up and read abit..... as I walked in, she looked a me in that tone of voice and asked "what ARE you reading?"

she must have found the mordant. :D

[Terry Hart cpf]

If this were warped I would comment that anytime one can add urine to a frame order & charge for it one is having a good day. But it'snot so I won't

[Terry Hart cpf]

And for the record let me state unequivocably that never have I or ever would I employ the use of such a mordant on a customers frame. No matter how appropriate it may seem at the time.

[Baer Charlton]

You didn't on mine?!?! Why TERRY, you SAID it was hisTORIcallllllllll... :smileyshot22:

[Terry Hart cpf]

TERical, I thought you said make it hysTERical. C'mon, it was at least a little funny wasn't it? But I'm afraid we scared off eloid. And after just one post! Bad framers, bad. I hope you'll come back eloid. I really want to know what you're up to? we'll try to help. Really we will.

[Whynot]

Jerome,

Had you ever tried that receipe for yourself? And, if the answer is yes, how did you manage to press it into the mould? Compo is supposed to have a strong memory yet be soft (putty like) at wormer temperatures that would allow for being easily worked by hand into the mold, from where it is then extracted, also by hand, a couple of minutes later, when it cooled down. True compo is flexible yet holds its shapes to the finest detail at room temperature when fresh. Everything less than that is a ...substitute for compo.

When it comes to compo it's just like with all espionage topics: they who know the truth won't tell it, but all others will.

[josephforthill]

For those who have not worked with compo, it is a little different from more common molding materials in that unlike, say, pouring plaster into a flexible latex-type mold, you need a hard mold (at least hard enough to withstand the pressure of pushing in the compo, which is like a stiff cookie dough). When the comp ornament is removed from the mold and hardens, it can be steamed, which will soften the ornament and release some of the glue, so that it will not only adhere, but will bend and conform to where it is being applied (curve of molding, corner of frame, etc.)

[eloid]

I agree with everyone - to buy a small quanity from a supplier.

With that said:

30gm RSG


what is RSG? plz

150gm Hide glue
220ml water ------ soak and warm to melt

90 gm crushed rosin
2 gm balsam pitch
1/2t venice terp
80ml boiled linseed oil ----- melt in double boiler

1kg whitting --- mix with glue and rosin

per Gold Leaf Studio's - Washington DC

do u have more details as to mixing this.. as to what to mix first and with what?

[eloid]

Could I ask what you would do with it? If you are thinking of making ornaments you would also need molds. Not so easy to press I think. It's nice for patching & repairs in some cases though.
Recipe from Roger Nielsen & Sue Davis, PFM, June 1995
Ingedients
130ml water
45gm rosin
40gm boiled linseed oil
75gm ground or pearl hide glue
15gm rabbit skin glue
550 gm whitting



Procedure: Well, if you're really interested and don't have a copy of the magazine or know someone who does contact picture Framing Magazine For the article "Your Own Compo Recipe & Sources For Others" June !995 p.38
or, like they said, Bomar Designs (913) 837-3202. They do have a $10 handling charge on orders under $50.


Whitting is Chalk??? or ? a type of white soft limestone where can u buy this?
what is a subtute for it....if you cant find it?

[Baer Charlton]

Whiting is whiting. You can get it at any GOOD paint supplier [HD and Slowes have no idea what it is. Do not substitute chalk or talc they are to soft; and marble dust is harder to find than whiting.

While the juicy stuff is heating in the double boiler, you mix all of the powdered together until it is all well blended.

Shape it into a volcano, and then you pour the liquid into the crater...

think gravey into mashed potatos

[eloid]

some of these compo ingredance are harder to find here in ontario canada
anyone have suggestions for suppliers, online or here in canda?

and suggestion for supplier for the below items?

rosin, linseed oil, pearl hide glue ,rabbit skin glue, whitting

[Baer Charlton]

Sepp leaf for one.

But for the common things, a good "Commercial" paint supply house (where the house painters go, NOT the house wives) and Home Depot doesn't count.

Easy Leaf for seconds.

[Terry Hart cpf]

What are you going to use for a mold?

[Baer Charlton]

Terry, slow down. They have to come to that realization on their own.
Like when I learned that a plaster of paris mould doesn't last very long.. :D
But I am liking the "low heat" metal lately.

But it is a lot easier to just dial Ed.

[Terry Hart cpf]

Just thought I'd throw that in there. Eloid seems much better at asking questions than answering them, maybe needs some practice? This has been sort of a one way conversation. On a weekly basis. Friday mornings must be slow for eloid. In fact I think it would be hard to find all those ingredients in one place. Kremer pigments might be the best bet.

[eloid]

I have ,hard shore rubber resin molds, The same kind rubber used for stamped
concrete driveways. .

[Baer Charlton]

I think you will find that stamping 3500psi concrete at ninhydrate hardness is a lot different than pulling 500psi in a mold press.

I just missed picking up a 1894 Whitman 18x26x14 book press. It was walking out the door when I got there. :fire: It went for $75 :faintthud:

A pinch roller press works too, or rig a pnumatic press.

pushing with your thumbs is do-able.... but get tiresome real quick.

[eloid]

[QUOTE=Baer Charlton;267861]I think you will find that stamping 3500psi concrete at ninhydrate hardness is a lot different than pulling 500psi in a mold press.

not refering to the process of stamping just the mold material used for the mold casting, remeber technique is everything.....

by the way 3500 psi is nothing try... 35 mpa

[Baer Charlton]

35 microns per acre doesn't sound like a lot of pressure... :D

The mold is the weakest link in the process. Even plaster of paris molds don't hold up to more than a few pressings.

I've seen cast bronze moulds that were "worn out". It's just a fact that you are hard pressing stone into this mould... The rubber stamping moulds that we used for the patio were not very sturdy.

But, it's your project. Don't forget to post pictures.:D