Revised June 2015
Platinite PT is designed for casting Platinum based alloys by the centrifugal technique. The powder is mixed with water and no special liquids are required.
The performance of this investment will depend on it being mixed and allowed to set as described below. Some minor variation in technique may be desirable to optimize the procedure for the specific flask size and mixing equipment being used.
The style of spruing should be appropriate to the patterns being used. In general if the flask only contains a few patterns they should be sprued from a central button. Larger numbers of patterns may be sprued as a tree.
A piece of absorbent paper with sides approximately 2-3" longer than the diameter of the flask to be used should be cut, The size of the flask and arrangement of the patterns should be such that the patterns are at least l/2 inch from the edge of the flask and the uppermost patterns are from 1 inch to ½ inch from the top of the flask. Attach the base of the tree or the button to the center of the piece of paper. (This may be done before or after the patterns have been attached), Using sticky wax attach the flask to the paper by placing a strong layer of wax around the outside of the flask. It is preferable that there is not a layer of sticky wax around the inside of the flask as this can weaken the investment.
A layer of cardboard or wood should be placed below the flask to support it while it is being invested and vacuumed. This support can be metal wood, heavy cardboard, etc., as long as it is rigid.
Place a collar around the top of the flask to extend 2-3" above the top of the flask. A larger extension is necessary for taller flasks and a smaller one for shorter flasks. A gummed tape or rubber collar may be used. The flask should not be lined.
If a mixer other than a Hobart or equivalent is used, then it may be necessary to change the recommended mixing time.
The flask should be cooled to room temperature. The may be accomplished by water quenching once the metal has cooled below red heat, provided that the metal can tolerate quenching. The casting can then be pushed out be hand and the remaining investment removed from the casting using a castblaster or water gun. The casting should be further cleaned by the techniques normally used.
Small amounts of gypsum or phosphate investment will contaminate Platinite and cause improper mixing and setting. Do not mix Platinite PT with any other investment!
This material contains crystalline silica and shows limited evidence of causing cancer in humans. IARC Class 2A. Prolonged exposure way cause lung injury (Silicosis). Users must comply with all applicable health and safety regulations relating to the safe handling of crystalline silica. See MSDS for detailed information.
This product contains crystalline silica, a chemical known to the State of California to cause cancer.
Except as expressly provided above, there are no warranties by Kerr or Shor, express or implied, including warranties with respect to description, quality, or fitness for a particular purpose.
In the event of a defect in material or workmanship, Kerr's and Shor's liability is limited, at Kerrs and Shor's option, to replacement of the defective product or part thereof, or reimbursement of the actual cost of the defective product. In order to take advantage of this limited warranty, the defective product must be returned to Kerr. In no event shall Shor or Kerr be liable for any indirect, incidental, or consequential damages whatsoever.