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NBS Special Publication , Выпуск 352
Стр. iii – The title of each standard can be found under all the significant key words which it contains. These key words are arranged alphabetically down the center of each page together with their surrounding context. The date of publication or last revision, the standard number, and an acronym designating the standards-issuing organization appear as part of each entry. A list of.
Стр. v – Available from the American Association of Textile Chemists and Colorists, PO Box 12215, Research Triangle Park, North Carolina 27709.
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Стр. iii – December 3 1 , 1970. These standards are published by technical societies, trade associations, government agencies and military organizations. The title of each standard can be found under all the significant key words which it contains. These key words are arranged alphabetically down the center of each page.
Стр. vi – US Department of Health, Education and Welfare, Food and Drug Administration, Washington, DC, Vol I, 1968 including all subsequent revisions. (9) Mills, PA, “Variation of Florisil Activity: Simple Method for Measuring Adsorbent Capacity and its Use in Standardizing Florisil Columns,” Journal of the Association of Official Analytical Chemists, Vol 51, 1968, p.
Стр. viii – Write to the Office of Engineering Standards Services, National Bureau of Standards, Washington, DC 20234, for copies of this index.
Стр. vi – Indian Standards Institution, Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002.
Стр. viii – The Society of the Plastics Industry, Inc. 250 Park Avenue New York, New York 10017.
Стр. 103 – Cables and Flexible Cords for Electric Power and Lighting for Working Voltages up to and including 11 kV (Price 3s.
Стр. 178 – . is present. 1.2 In both Procedures 1 and 2 alternative procedures are described for weighing oven dried specimens; in the oven while hot and outside the oven at room temperature. NOTE.
Стр. vii – National Electrical Manufacturers Association 155 East 44th Street New York, New York 10017 NEMA.
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Brush v Spray
Acrylic varnishes can be applied with a brush or used as a spray. For many it will be a personal preference. Sprays tend to be more popular (especially amongst hobbyists) since they can be applied far quicker and with less the risk of the varnish foaming or bubbling. For these reasons we will focus on sprays in this article.
Acrylic varnish is a mixture of acrylic polymers, solvents and water. Different varnishes will have varying amounts of these 3 components and subsequently their level of performance will be driven by them.
A good quality varnish will contain a high level of acrylic polymers as it is these that will produce the clear film that will help seal your artwork. The natural behaviour of these polymers is to want to pull together (bind). However, they are prevented from doing so by the solvent and water.
When varnish is applied to a surface the water and solvent elements will gradually evaporate and, in doing so, they allow the acrylic polymer particles to pull together tightly. They form a clear, dry and stable film.
High Solvent, High Odour
Perhaps the biggest drawback of high solvent-based varnishes is that they give off a very strong smell. As a result, these sprays are far from ideal for indoor use even in a well-ventilated room and with the use of a face mask.
Varnishes with a high water and acrylic polymer content (and less reliance on solvents) are developing all the time. When used correctly these can perform at similar levels to traditional high solvent/high polymer-based acrylic varnish sprays.
Both Zieler’s gloss and matt clear varnish sprays are 90% solvent-free so they produce far less odour. This makes them ideal for safe indoor arts and craft (as well as outdoor use). The high concentration of acrylic polymers provides perfect coverage to give you a clear, strong seal over your work.
Which Paints Can Acrylic Varnish be Used On?
There is a common misconception that acrylic based varnishes can only be used with acrylic paint. The polymers in the varnish will protect paintings that have been done with acrylic paint, oil paint and even alcohol-based ink. Of course, it is always important to ensure that any paint/ink is completely dry before applying any type of varnish.
Due to level of water content in Zieler varnish sprays, they are not recommended for use with watercolour paint (or pastel work) as the water in the varnish may end up mixing with the water in the paint.
Acrylic varnish sprays work particularly well on porous surfaces such as canvas, wood and stone making them extremely versatile amongst many forms of art – from museum paintings to decorated rocks and pebbles. They are less effective on non-porous surfaces such as glass and metal.
Acrylic varnishes with high water content such as Zieler’s, are not best suited to paper and card for the simple reason that these surfaces are highly absorbent. Even though there is paint on the surface of the paper or card, there is a chance the water from the varnish will seep through the paper instead of sitting on it. When this happens protection is compromised and the paper may buckle or warp.
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