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Shake the bottle and mix the resin in the vat before start printing!
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User Guide for Cast
For other resin user guides, please visit https://siraya.tech support section
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This guide is for both Cast Purple and Cast True Blue
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Cast is an affordable castable resin designed for lost wax method. Below is the recommended print setting, cleaning, curing and burn out recommendation.
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We like to thank many users, including VOG (https://www.youtube.com/watch?v=mdHpgwGPzcE) to help each other print and cast well.
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The ideal printing temperture for Cast is beyween 25-35C (resin temperature).
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Cast is designed for MSLA printer in mind. It can work in DLP and laser SLA printer but you would need FEP film based vat. Since it is mostly for small jewllery, use the smallest build volume printer for printing
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Best print with recommended support setting, see below
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Please download profiles base for Elegoo, Anycubic, Phrozen, Peopoly, EPAX, Creality
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https://drive.google.com/drive/folders/1eCz4_dc0fT-jfBLp4L9mKYebY90lfHHO?usp=sharing
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Exposure:
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RecommendedResin Temperture 25-35C Room temperature 20-25C
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PrinterLayer HeightExposure (s)# of Initial LayersExposure for Init LayersExposure (s)# of Initial LayersExposure for Init LayersNote
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Photon50um18 (s)580s18 (s)580s
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EPA X150um15 (s)565s15 (s)565s
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Photon S50um15 (s)565s15 (s)565s
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Mars50um15 (s)565s15 (s)565s
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Mars 2 Pro50um4s535s4s535s
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Mono50um3.2s530s3.2s530s
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Sonic Min 4K50um4.6s540s4.6s540s
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Please Keet Lift Speed under 50mm/min for Cast resin no matter what printer you use.
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Important Notice
Please note - the Cast resin contains wax elements that are sensitive to humidity. Do not leave the resin exposed to open air for extended periods, especially in humid environments. The resin can absorb moisture from the air, leading to issues with printing and casting.
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Cleaning:
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Use a painter brush (or any brush made with hair) remove excess resins on the printed part with Use 95% concentrated Ethanol (preferred) or IPA to clean. Some form of methnol should work but make sure it does not contain acetone.
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Do not submerge the parts in alcohol for more than 30 seconds. After 2-3 minutes of cleaning action, remove alcohol with a hair dryer or air blower. For complex part with lots cavities, it may be a good idea to clean/dry multiple times.
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Dry as quickly as one can once the print is cleaned with compressed air
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Surface should be matte, if you see shiny spots, repeat cleaning on those spots.
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AVOID USING WASH AND CURE ALL IN ONE MACHINE
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Post Curing:
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Make sure print is completely dry before proceeding.
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It is important to fully cure Cast to ensure clean burnout.
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It is also important to ensure print does not absorb moisure as it may also affect burnout results
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We recommend putting print in glycerine to speed up curing without getting water on the print.
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Curing time varies with light fixture but most likely to be over 10 minutes and longer.
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AVOID USING WASH AND CURE ALL IN ONE MACHINE
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Fully Cured Print Should feel hard and a bit brittle
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Investment and burn out recommendation
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Our users have reported successes with Plasticast® investment by Ransom & Randolph
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https://www.ransom-randolph.com/plasticast
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Recommendend Burn out schedule can be found here:
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https://www.ransom-randolph.com/_files/ugd/cc5f22_902ad781b4e74bf3b3d55bff34f7fe6c.pdf
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Some user may have hard time finding Plasticast, here is an alternative found in UK and recommended by VOG
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https://www.srs-ltd.co.uk/products/investment-powder/classic
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MSDS for Cast Resin
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https://drive.google.com/file/d/1L_SanXBseVcXb8rWoZISSRgoiCXcRK3i/view?usp=sharing
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Cast Purple Mechanical Properties
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​Shore D 70
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Tensile Strength 20Mpa
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Young’s Modulus 600Mpa
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Elongation At Break: 5%
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Viscosity:300cps
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Heat Deflection Temperature: 50C
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Shrinkage6% per volume
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Cast True Blue Mechanical Properties
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Shore D 65
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Tensile Strength 20Mpa
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Young’s Modulus 600Mpa
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Elongation At Break: 4%
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Viscosity: 300cps
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Heat Deflection Temperature: 50C
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Shrinkage 6% per volume
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Casting resins and waxes have a Specific Gravity of 1, whereas gold…
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Gold Specific Gravity
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Gold Type S.G.
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24k Gold 19.32
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18K Green 15.9
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18K Yellow 15.58
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18K White 14.64
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18K Red 15.18
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14K Yellow 13.07
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14K White 12.61
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14K Red 13.26
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10K Green 11.03
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10K Yellow 11.57
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10K White 11.07
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10K Red 11.59
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Silver 10.49
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Take the volume in ml from Slicers like Chuitubox Lychee and Vlare, divide by 1000 to get the weight of the model in wax and then multiply by the specific gravity for the gold you want to use and you’ll get a rough estimate of the weight of gold
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