Using a fine brush apply 20% weight/volume of B72 dissolved in acetone (i.e. 20g of B72 to 100ml Acetone) and allow to dry up to l5 minutes. On particularly rough surfaces a second coat maybe preferable to form an even surface on which to apply the marking.

Easy application for repairs of plastics, ceramics, metals, wood and other substrates. Paraloid B-72 is reversible in acetone, ethyl alcohol and many other solvents. Paraloid B-72 is reversible in acetone, ethyl alcohol and many other solvents.

Paraloid® is one of the most frequently used acrylic polymers, employed mainly for its adhesive and consolidating properties in the conservation of a wide range of materials.

According to an issue of the NPS Conserve O Gram, you mix a 25% solution by weight in acetone. B-72 comes in small pellet form when you purchase it online. When I first attempted this, I poured the pellets directly into a beaker and added acetone.

For the sake of simplicity, Paraloid B-72 will be referred to as ‘B- 72’ throughout this paper. It was used in conservation as early as 1949 (perhaps the first use of an acrylic resin) as a protective coating for metals (Rohm and Haas 1950).

The majority of denture bases are made from heat-cure acrylic resins which are believed to result in the release of certain toxic chemicals such as formaldehyde, methyl methacrylate, methacrylate acid and benzoic acid, causing serious reactions in the surrounding tissues.

Almost all epoxy resin sold today is safe for indoor use. This means the fumes will not be harmful but not always nonexistent and skin contact is unlikely to cause irritation. You should not worry too much since it is easy to take proper, simple precautions to ensure your safety.

Breathing highly concentrated epoxy vapor can irritate the respiratory system and cause sensitization. When you inhale these dust particles, they become trapped in the mucous lining of your respiratory system. The reactive material can cause severe respiratory irritation and/or respiratory allergies.

1. Handling Care. We can come in contact with acrylic resin either through skin contact or inhalation if it is in its powder form. But on the other hand, acrylic resins may contain traces of ethyl acrylate, a chemical that is notorious for its potential danger if it comes in contact with humans.

Paraloid B-72 (also known as Acryloid) is a copolymer of ethyl methacrylate and methyl acrylate supplied in 100% resin pellets which are soluble in acetone, toluene and xylene. An excellent general purpose resin/adhesive, paraloid can be applied in either clear or pigmented coatings by a variety of application methods and can be air dried or baked.

An excellent general purpose resin/adhesive, paraloid can be applied in either clear or pigmented coatings by a variety of application methods and can be air dried or baked. Can be used for a number of purposes here are some examples:

Do it in a well vented area. To make the 25% solution with a final volume of 100 ml, you would first measure 25 grams of B-72 pellets. If using the cheesecloth method, you place these into the cheesecloth and wrap it into a ball. You then add acetone until the volume of the acetone and the pellets together are 100 ml.

If you want to make a 500ml of 10% solution, you could suspend 50% of Paraloid in the jar and add say 300ml of solvent (under the necessary quantity by some way so gives a bit of wiggle room). Once the Paraloid has dissolved, you can add more acetone to fill it up to the 500ml mark and give it a good stir.