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Seahorse and Shell Dish Mold Brief Instructions for Each Option Spray

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Seahorse and Shell Dish Mold Brief Instructions for Each Option Spray REUSABLE MOLDS FOR GLASS CASTING There are only two choices for sure the spray reaches all the inner primers: Hotline Primo™ Primer surfaces. Do not saturate the sur- and ZYP BN Lubricoat™ (former- face. You should not see “pools” ly MR-97). The ZYP is the easiest of product forming on the surface. to apply and remove. It is an If it is the first time ZYP has been aerosol and, after firing, brushes applied to the mold, it is necessary off easily from the molds and can to apply a second coat of the be washed off the glass pieces. product. Castings created using ZYP have exceptionally smooth surfaces and almost never require grinding or Seahorse and Shell “cold work.” Dish When applying or removing either In one firing create a graceful of these two primers, it is advis- dish for holding soap on a vanity, able to wear a dust mask. or jewelry or change on a dress- er. Make the casting exceptional Primo is a traditional kiln wash by fusing a cutout of dichroic or that is applied with an artist’s iridized glass onto the back in a brush. It’s a trusted and proven second firing. product, but requires a bit more Before applying the second coat, nnn “elbow grease” to remove after let the mold dry for five minutes. firing. Primo’s advantages are its Apply the second coat using an- low cost and availability. other four to five-second burst of The Seahorse and Shell Dish mold Brief instructions for each option spray. Let the mold dry for ten to can be filled with frit, broken sheet follow: fifteen minutes before filling. glass, casting rocks, or billet Again, the double coat of ZYP chunks. The larger the glass To apply ZYP, work in a well ven- only need be applied the first time pieces, the more clarity the final tilated area or outside, and hold the mold is used. Thereafter, only casting will have. the well-shaken can 10 to 12 inch- one coat is necessary. For more es from the mold. Hold both the information about ZYP, visit Getting Started mold and the spray can upright. Colour de Verre website’s Learn Always start the same way: Clean Apply the first coat using a four to section. There, download and read your Colour de Verre Seahorse five-second burst of spray in a “Advanced Priming with Boron and Shell mold with a stiff, nylon sweeping pattern across all the Nitride Aerosol” and watch the brush to remove any old kiln wash. mold’s cavities. While spraying, video “Priming with ZYP BN Lu- (This step can be skipped if the slightly tilt the mold back and bricoat.” mold is brand new.) forth and left and right to make To o l s Supplies Availability ✓A Colour de Verre Seahorse and ✓Hotline Primo Primer™ or ZYP Colour de Verre molds are avail- Shell Dish mold BN Lubricoat (formerly MR-97) able at fine glass retailers and ✓Large artists’ brush ✓Assorted frits, sheet glass, billets, many online merchants including ✓Digital scale casting rocks, etc. our online store, ✓Dust mask www.colourdeverre.com. REUSABLE MOLDS FOR GLASS CASTING If you choose to use Primo Primer, primed mold with 750 grams of mix one part dry primer powder glass. Slightly mound the glass as with four parts water. Next, give shown in the photographs. the molds five coats of Hotline Primo Primer™. Firing the Molds Place the filled mold into the kiln. Apply the Primo Primer™ with a Use either Casting Schedule #1 or soft artist’s brush - not a hake Casting Schedule #2 depending brush - and use a hair dryer to on the materials used to fill the completely dry each coat before molds. Don’t rush the schedule’s applying the next. The mold slow cooling ramp as this allows should be totally dry before filling. We find a convenient choice for for proper annealing. Also note The primer need not be pre-fired. filling this mold is mosaic size frit. that the schedules need to be mod- Choose light, transparent colors as ified for kiln load, COE, and glass One important hint: This primer the color will intensify as the color. Heating element position settles very quickly. Each time the casting is much thicker than can also effect firings. Use lower brush is dipped, be sure to give the standard sheet glass. That said, frit temperatures when using a top primer a good stir so all the ingre- of any mesh, billets, or casting element kiln. dients stay in solution. If the rocks can be used. If you are using primer has sat more than five opal frits, better results are Base Feet minutes, the active ingredients will obtained by mixing the opal frit Give cast boxes a professional fin- cake on the container’s bottom. with an equal amount of clear frit. ish with the addition of feet. Use Make sure to stir these sediments An economical choice is to use peel-and-stick, silicon cabinet back into solution. leftover sheet glass that has been bumpers, e.g. 3M Bumpon™, available from most hardware Filling the Molds cut or broken into small chunks. The molds are intended to be used Whatever the glass type, fill the with COE 96 or COE 90 art glass. Casting Schedule #1* Colour de Verre molds should not be used with borosilicate, Pyrex, For Fine and Medium Frit crushed bottles, or float glass. High Segment Ramp Temperature Hold temperatures can have negative 1 300ºF/165ºC 1250ºF/675ºC 30 minutes effects on both the molds and the 2 300ºF/165ºC 1410-1420ºF/765-770ºC 10-20 minutes primers. When using frits, 3 AFAP 960ºF/515ºC 60 minutes especially powders, it is advisable 4 50ºF/30ºC 800ºF/425ºC None to wear a dust mask. 5 100ºF/60ºC 400ºF/200ºC Off. No venting Casting Schedule #2* For Sheet and “Chunky” Glass Segment Ramp Temperature Hold 1 300ºF/165ºC 1250ºF/675ºC 30 minutes 2 300ºF/165ºC 1430-1440ºF/775-780ºC 30-45 minutes 3 AFAP 960ºF/515ºC 60 minutes 4 50ºF/30ºC 800ºF/425ºC None 5 100ºF/60ºC 400ºF/200ºC Off. No venting * Schedule for COE 96. For COE 90, increase casting temperature by 15ºF/8ºC. AFAP means “As Fast As Possible”, no venting. REUSABLE MOLDS FOR GLASS CASTING stores. This will also protect table- Variation: Backing the Piece Place the sheet of glass on the tops. Exceptional results can be created workbench. If the glass is coated (iridized or dichroic), make sure Variation: Filling Sea life by backing the cast piece with a the coated side is down. A great effect can be created by sheet of colored, iridized, or filling the seahorses and/or small dichroic glass. shell with a contrasting frit color. Cast the Seahorse and Shell Dish as described above in either Clear or a light, transparent color using mosaic frit, glass sheet pieces, cast- ing rocks, or billet pieces. (This will ensure the greatest clarity.) Fire the Use the template to cut a backing piece from the sheet glass. Careful- ly place the piece of glass into the Again, starting with a freshly mold on top of the casting. If the primed mold, sift a small amount backing piece was cut from either of Black powder into the sea hors- iridized or dichroic glass, make es and small shell. This will accen- sure the coating side is down, fac- tuate the mold’s fine detail. Next, ing the casting. It is often helpful stabilize the powder by adding a mold using Casting Schedule #2. fine frit to fill the depressions. The When the kiln and mold cools, fine frit can be the same color as remove the mold from the kiln and the glass chosen for the body or a remove the casting. Wash the cast- contrasting color. ing to remove any traces of primer. Clean and reprime the mold and carefully place the casting back into the mold. Backing Schedule* Segment Ramp Temperature Hold 1 150ºF/85ºC 300ºF/150ºC 30 minutes 2 250ºF/140ºC 1250ºF/675ºC 10 minutes Fill the rest of mold in the matter 3 300ºF/165ºC 1420ºF/770ºC 10-20 minutes described in the previous section. Make sure that the total amount 4 AFAP 960ºF/515ºC 60 minutes of glass in the mold is 750 grams. 5 50ºF/30ºC 800ºF/425ºC None 6 100ºF/60ºC 400ºF/200ºC Off. No venting * Schedule for COE 96. For COE 90, increase target temperature by 15ºF/8ºC. AFAP means “As Fast As Possible”, no venting. REUSABLE MOLDS FOR GLASS CASTING to use a small dab of white glue to hold the sheet glass in place. Return the mold and glass back to the kiln and fire using the Backing Schedule. Frit from Uroboros. Brocken double thick sheet glass from Spectrum. Dichroic sheet glass from CBS Coatings by Sandberg. Seahorse and Shell Dish Template This Side Against Glass.
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