Ipaint airbrush studio email12/11/2022 Golden MSA Varnish and Golden Archival Spray Varnish You can use the same MSA that you primed with, it works on top of oil or acrylic. If you plan on a final varnish, a gloss varnish will keep the metallic shine the best. Remember that transparent colours will allow some of the metal leaf to shine through the colour (especially if painted on thinly or in a glaze), while opaque colours will completely cover over it, and metallic paints will be less shiny than the metal leaf. Lots of artists like the look of bits of shiny metal peeking out of the paint. This will seal the MSA varnish from any future solvent applications. If you are painting over the metal leaf with oil paint you should next apply a coat of GAC 200 or another clear gloss fluid acrylic medium. If you are painting in acrylics and are using one of the metals that does not tarnish (genuine gold 22-24ct and genuine or imitation silver) you can skip the varnish sealer and use the acrylic medium coat in the next step instead. Sealing the metal with the solvent-based varnish before applying acrylics solves this problem. Genuine copper and imitation copper (copper and zinc) will tarnish.Īcrylic paint and mediums contain ammonia which will tarnish any leaf containing copper.Imitation gold (copper and zinc) will tarnish. #Ipaint airbrush studio email plusGenuine gold of less than 22ct (gold plus copper – or sometimes silver or another metal) will tarnish.Genuine gold of 22ct or more will not tarnish.Imitation silver (aluminium) won’t tarnish (sometimes it will slowly tarnish if it is not pure aluminium).If left unsealed some metals will tarnish over time from exposure to air and some will not: Sealing with the MSA varnish prevents both kinds. There are two ways that the metal leaf can tarnish. Read the label for the dilution instructions of the brush-on varnish. Three coats of spray varnish or one thin coat of MSA Varnish brushed on should be enough to protect the surface from tarnishing. Using a gloss varnish allows you to retain the shine of the metal. After speaking with a technical expert and testing it ourselves we determined that the Golden MSA varnish is the correct choice for sealing metal leaf without damaging it. You need to choose a product to seal the tarnish-able leaf that will not itself cause tarnishing. You should seal all metal leaf because it is thin, delicate and can be scratched, but some metal leaf will also tarnish if you don’t seal it. Then spray or brush on Golden MSA (Mineral Spirit Acrylic) Gloss Archival Varnish to seal and prime the metal leaf surface for the oil or acrylic paint layer. It needs to have air reach it to finish the curing process and become hard and stable. Then let it dry thoroughly, usually about three days or the curing time listed on the bottle of gold size, before sealing it in the next step. Rub the gold down firmly through a piece of paper or cloth. Brush the excess off gently with a soft brush. I use the transfer gold or silver leaf as opposed to the loose metal leaf because it is so much easier to work with and you don’t really need the loose leaf unless you are working on a surface with grooves or carving that you need to push it down into. Apply your metal leaf to your support following the directions on your bottle of acrylic gold size or oil-based gold size (that’s the adhesive). After you have applied your gilding and let it cure you then apply one or two types of sealer and you are ready to paint.īe aware that metal leaf is so thin that any texture underneath will show through, so you may wish to prepare the surface of your support to be as smooth as possible. The procedure for painting on top of gold leaf, silver leaf or copper leaf – genuine or imitation metal leaf – is not as complicated as you might think. A painting in transparent acrylics or oils on top of a panel covered in gold leaf, or another metal leaf, can glow with a shining light.
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