Pic100Burnout

=Perfactory RP Materials - Casting Burnout Instructions (from Envisiontec)=

Recommended: Coat the parts with disclosing wax, shellac, mineral oil, sprue wax, or hair removal wax

Silver and Gold:

 * **Raise temp to** **150°C (300ºF)** || **5°C per min** || **hold for 3 hours** ||
 * **Raise temp to** **370°C (700ºF)** || **5°C per min** || **hold for 1 hour** ||
 * **Raise temp to** **540°C (1000ºF)** || **5 °C per min** || **hold for 5 hours** ||
 * **Raise temp to** **750°C (1382ºF)** || **Normal Rate** || **hold for 5-7 hours** ||
 * **Lower temp to XXXX hold temp** || **Normal Rate** || **hold until cast** ||


 * The wait time at 750ºC can be reduced for smaller flask sizes**


 * Then take the flask out of the furnace and allow it to cool slightly before inserting it into the casting machine.**


 * Cooling is generally just sufficient to allow the fierce red heat to fade from the flask.**


 * Use standard gypsum and mixing procedure the recommended powders and suppliers are listed below.**


 * SRS Silk ([|www.srs-ltd.co.ltd] )**
 * Hoben Goldstar XXX ([|www.hoben.co.uk] )**
 * Ransom and Randolph Ultra-vest ([|www.ransom-randolph.com])**


 * Please contact individual suppliers for specific details on availability and casting parameters**

Alternative Settings as described by someone from Envisiontec Europe for our friend Neville in South Africa:

 * PLEASE MAKE SURE THE OVEN IS COLD WHEN YOU START CASTING.
 * Make sure the investment is sitting at least one inch (25mm) above the oven floor.
 * Please make sure that you follow the burnout cycle I am recommending to you below for fine detail parts:
 * Stage 1- from 0 to 150 F in 2 hours and hold for 2 hours
 * Stage 2- then from 150 to 600 F in 2 hours and hold 10 minutes
 * Stage 3- 600F to 900F in 2 hours wait 10 minutes
 * Stage 4- 900F to 1390F in five hours and wait four hours depending on part size
 * Stage 5- Ramp down in one hour to casting temperature, wait minimum two hours before you pour the gold or silver.

I would leave the flask to air dry for a least 16 hours then start the burn out cycle from 0 C to 150 C in 2 hours and hold for two hours and then continue with there burnout cycle, one thing I’ve noticed is that the material does not melt out, so keep with the sprue facing down - the carbon and residue has a better chance of escaping with the sprue facing upward.


 * Platinum**:

Bring temperature down to casting.
 * **Raise temp to 150ºC (300ºF)** || **5ºC per min** || **Hold for 3 hours** ||
 * **Raise temp to 370ºC (700ºF)** || **5ºC per min** || **Hold for 2 hours** ||
 * **Raise to temp 540ºC (1000ºF)** || **5ºC per min** || **Hold for 5 hours** ||
 * **Raise temp to 870ºC (1600ºF)** || **Normal rate** || **Hold for 4-5 hours** ||

//Please note:// Any investment that requires an acid binder will not cast with the PIC100.

You must use a non-binder based investment such as GOLDSTAR HT from Hoben International or ASTRO-VEST from Ransom and Rudolph.

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