09-15-2010, 03:51 PM
A helpful word ...
When pouring resin for a river (or Silastic RTV for a mold, or whatever ...) pour from a height and pour just fast enough (or slowly enough, depending on your point of view) so that the constant pour comes to almost a tooth pick or ballpoint pen refill size right where it hits the surface of "the pour."
The philosophy is that if you "neck down" the liquid being poured to a very thin stream at the point of contact with the "pour site," any bubble larger than the diameter of the stream at contact will disperse before the "contact point" and the prospect of air bubbles in the final product will be greatly reduced. Pour primarily in one spot and let the liquid spread on its own. If that is not possible, slowly move the "point of contact," keeping it within the area of the spreading liquid while continuing to pour the "skinny pour" as the "contact point" moves towards the area where more of the liquid being poured is needed.
It also helps if you don't do anything to encourage the development of air bubbles in the first place, so stir slowly and smoothly!
When pouring resin for a river (or Silastic RTV for a mold, or whatever ...) pour from a height and pour just fast enough (or slowly enough, depending on your point of view) so that the constant pour comes to almost a tooth pick or ballpoint pen refill size right where it hits the surface of "the pour."
The philosophy is that if you "neck down" the liquid being poured to a very thin stream at the point of contact with the "pour site," any bubble larger than the diameter of the stream at contact will disperse before the "contact point" and the prospect of air bubbles in the final product will be greatly reduced. Pour primarily in one spot and let the liquid spread on its own. If that is not possible, slowly move the "point of contact," keeping it within the area of the spreading liquid while continuing to pour the "skinny pour" as the "contact point" moves towards the area where more of the liquid being poured is needed.
It also helps if you don't do anything to encourage the development of air bubbles in the first place, so stir slowly and smoothly!
(Is that explained clearly ... or is it "convolutingly confusing?" My daughter accuses me of explaining things that way all the time!)
biL
Lehigh Susquehanna & WesternÂ
"America will never be destroyed from the outside. If we falter and lose our freedoms, it will be because we destroyed ourselves." ~~Abraham Lincoln
Lehigh Susquehanna & WesternÂ
"America will never be destroyed from the outside. If we falter and lose our freedoms, it will be because we destroyed ourselves." ~~Abraham Lincoln