Molding big bass

Submitted by Bluechalice on 02/14/2003. ( ) 63.210.118.120

I am getting ready to skin mount a 8lb Largemouth Bass...but before doing so...I want to make a complete mold of the bass so I could also use it for Repro mount...I am thinking of making a 2 sided mold...so I could cast in latex etc...I was wondering by doing so...will the Bass(being in the Plaster mold for the time being, waiting for the plaster to cure...) deteriorate to a bad/unmountable condition, eg: the fins etc....Also any tips would be helpful....
I was also wondering if Taxidermy shops would be interested in making a mold of the 8lb bass for their use and what kind of deal is usually exchanged?

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The heat and quick lye will cook the fish.

This response submitted by John C on 02/14/2003. ( ) 64.216.172.87

The problem with plaster is the heat from quick lye that is needed to set the plaster, a form if gypsum.

Its a typical chemical chemical reaction, but can build heat in the 180f.

Thin coats of plaster may work, but you may need a harder grade such as Hydrocal in order to pul this off.

Many years ago, one of our trade journals had an article about doing stretchable latex reproductions.

Does anyone know what kind of latex this is?

I have used Chicago 501 casting latex to repo fish, but it is a non stretchable type.

Now if I were you, I would use a good grade of silicone, wiether a tin based or platinum based silicone would be best.

Surely someone here can tell you which would be best. Good silicone is not cheap.


time for plaster to set

This response submitted by morrill on 02/14/2003. ( rewthybm@aol.com ) 205.188.209.12

You csn do this with molding plaster, the regular stuff # 5 molding plaster I believe. . Dry the fish with a hair dryer before pouring. Mix up a batch of plaster, pouring part of the unmixed batch into another pan. Stir one bowl of the plaster until the plaster is quite thick not very thick, ...quite thick. You want it to set qickly but you do not want it so stiff it will make bubbles on the mold.., and creamy and then quickly flow it over the fish. When the wet shine has gone off the setting plaster, about four minutes, Stir snd pour the rest of the plaster. Add re enforcing to the second pour to give strength to the plasster . Pour the second coat over the first gently so's not to move the first pour or else the under lying plaster will move and smudge the detaail. Also if you are rough at this point the re-enforcing may fall through the first coat and show as streaks or lines in the mold. Powdered sawdust, sisal pulled out into little pattied...I believe Raven uses cheesecloth for this. Never tried it but guess it must work well or he would be using something else. When the plaster has heated and begun to cool (about twenty minutes if the plaster was prepared properly...( enough plaster in the water and stirred to the right consistency) Remove the top half. Quickly wash the fish and plaster shelf, Shellac and wax the shelf around the fish( Four or five minutes) Then mix another batch of plaster and pour. Again watch the plaster and take the cover off just as the as the heat of setting has reached its peak and has begun to subside. Then you can take the cover off , remove the fish and,if you understand the handling of plaster, and can do this witout panic. rots uv ruck.


Potential problem

This response submitted by Raven on 02/14/2003. ( ) 24.150.167.36

As mentionned the heat generated from molding can get quite high. So high in fact that in using plaster or resins to mold fish I have seen fish get completely cooked! Flakey flesh and all. And in the process - the skin is completely destroyed. Doesn't always happen - but can - so watch your heat if you plan skin mount. =)


Thanks guys

This response submitted by bluechalice on 02/16/2003. ( ) 209.245.70.62

I was also thinking of buying the Chemco Mold Builder...anyone tried this...I think its a cheaper material and it air dries...and doesnt heat up...I was wondering if this is a better way to go...
Using Mold Builder and then backing it up with plaster....
Oh yes...have anyone tried casting stuff in regular insulation foam that comes in a can...that when you spray on it expands and then harden up?
I live in Los Angeles and was wondering if anyone knows where there is a store that sells all these: Latex, fiberglass lay up resinrigid urethane, urethane foam etc....
Final question:
Is PVA size(the one used for sizing Linen) same as PVA release like the one sold in WASCO?


Thanks guys

This response submitted by bluechalice on 02/16/2003. ( ) 209.245.70.62

I was also thinking of buying the Chemco Mold Builder...anyone tried this...I think its a cheaper material and it air dries...and doesnt heat up...I was wondering if this is a better way to go...
Using Mold Builder and then backing it up with plaster....
Oh yes...have anyone tried casting stuff in regular insulation foam that comes in a can...that when you spray on it expands and then harden up?
I live in Los Angeles and was wondering if anyone knows where there is a store that sells all these: Latex, fiberglass lay up resinrigid urethane, urethane foam etc....
Final question:
Is PVA size(the one used for sizing Linen) same as PVA release like the one sold in WASCO?


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