Who We Are
Alchemy is a high quality chemicals production company, specialized in top grade art supplies and serving various industries.
Introducing new types of epoxy
Alchemy chemicals was established to introduce new types of chemicals and resins to the market for various uses. We offer both general purpose epoxies and dedicated epoxy products for art and industrial use.
Alchemy works in mysterious ways
Epoxy is a great material, it can used in various cases. Here are some of the questions that we got from consumers interested in epoxy.
What is epoxy?
Epoxy coatings are generally packaged in two parts that are mixed prior to application. The two parts consist of 1) An epoxy resin which is cross-linked with 2) A co-reactant or hardener.
Why use epoxy?
Epoxy coatings are formulated based upon the performance requirements for the end product. When properly catalyzed and applied, epoxies produce a hard, chemical and solvent resistant finish. They are typically used on concrete and steel to give resistance to water, alkali and acids. Yet new trends have been practicing epoxies in arts and decoration. It is the specific selection and combination of the epoxy component and the hardener component that determines the final characteristics and suitability of the epoxy coating for a given environment.
What are the common epoxy applications?
Epoxy is used in a wide variety of uses including 1- Wood varnish 2- Wood Sealer 3- Epoxy pouring art 5- Table top application 6- Epoxy flooring 7- Steel coating
Like other resins the general rule is that one can add up to 10% by weight if using a powder pigment, up to 5% if using any other liquid colorant. Similarly, water-based colorants are out, but usually oil or spirit- based are ok, plus of course specially formulated resin colorants which are usually pre-mixed with a small amount of resin.
Getting Rid of Bubbles
Careful heating with hair-dryer or heat gun over the open surface of the mixed or curing resin. The heat source should not be too close, in the case of a heat gun about 30cm away. Another method is to put some methylated spirit in a small ‘mistifier’ bottle and spray a fine mist on the surface. The alcohol doesn’t adversely affect the resin and evaporates quickly, but acts long enough to reduce the surface tension and pop the air bubbles. Methods of thinning Thinning the resin itself could help a lot in the elimination of air bubbles when mixing. It can also help the resin to better impregnate a surface if the resin is being used as a coating, or to make it flow better into a complicated form. Apparently there are a number of ways of doing it, though I can’t vouch for them because I haven’t tried them myself. One method is to heat the resin! Epoxy changes viscosity, becoming thinner when it’s warmed. The recommended method is to heat up the two parts separately (whichever way you prefer ... but standing the cups in hot water would probably be best) and then mix them. As always, bear in mind that heating will reduce the working time and accelerate the cure. Note also that if using two cups for dosing the resin initially, once warmed both should be decanted into a third cup for mixing together to maintain the ratio. Based on practice the temp should not exceed 115F (46C). It is not a very good idea to heat it if you’re pouring a massed volume anyway though, because it increases the risk of the resin overheating with its own exotherm. Another method is either to add acetone (not more than 10% by volume) or methylated at 15-20%. Adding solvent will affect the strength of the cured resin, but this may not matter too much with small castings.