The decorative painters' and glaziers' guide

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Page 94 - ... great clearness of other colours is in question, should be itself white ; whereas the browner sorts of polishing dust, as being cheaper, and doing their business with greater dispatch, may be used in other cases. The pieces of work to be varnished should be placed near a fire, or in a room where there is a stove, and made perfectly dry, and then the varnish may be...
Page 93 - Shake the mixture well together, and place the bottle in a gentle heat, till the seed-lac appears to be dissolved ; the shaking being in the meantime repeated as often as may be convenient : and then pour off all that can be obtained clear by this method, and strain the remainder through a coarse cloth. The varnish thus prepared must be kept for use in a bottle well stopped.
Page 86 - When wood or leather is to be japanned, and no priming is used, the best preparation is to lay two or three coats of coarse , varnish, composed in the following manner. Take of rectified spirits of wine one pint, and of coarse seed-lac and resin, each two ounces ; dissolve the seed-lac and resin in the spirit, and then strain off the varnish.
Page 94 - Let the spirit then be poured off or freed from the phlegm and salts by means of a tritorium or separating funnel ; and let half an ounce of the pearl-ashes, heated and powdered as before, be added to it, and the same treatment repeated. This may be done a third time if the quantity of phlegm separated by the addition of the pearl-ashes appear considerable.
Page 90 - ... so as to destroy or weaken its tenacity. The stove should not be too hot when the work is put into it, nor the heat increased too fast, either of which errors would make it blister ; but the slower the heat is augmented, and the longer it is continued, provided it be restrained within the due degree, the harder will be the coat of japan. This kind of varnish requires no polish, having received, when properly managed, a sufficient one from the heat.
Page 91 - ... made hotter than boiling water without damage, than for its beautiful appearance. It is to be made by means of a varnish prepared in the following manner : — Take of good linseed oil one gallon, and of umber half a pound. Boil them together till the oil...
Page 88 - Prussian blue, or of smalt. The colour may be best mixed with shell-lac varnish, and brought to a polishing state by five or six coats of varnish of seed-lac : but the varnish, nevertheless, will somewhat injure the colour by giving to a true blue a cast of green, and fouling, in some degree, a warm blue by the yellow it contains ; where, therefore, a bright blue is required, and a less degree of hardness can be dispensed with, the method before directed in the case of white grounds must be pursued.
Page 91 - The best kind of tortoise-shell ground produced by heat is not less valuable for its great hardness, and enduring to be made hotter than boiling water without damage, than for its beautiful appearance. It is to be made by means of a varnish prepared in the following manner :• — Take of good linseed-oil one gallon, and of umber...
Page 83 - The advantage of using such priming is, that it makes a saving in the varnish used ; because the matter of which the priming is composed fills up the inequalities of the body to be varnished, and makes it easy by means of rubbing and water-polishing to gain an even surface for the varnish. This was, therefore, such a convenience in the case of wood, as the giving a hardness and firmness to the ground was also the case in leather, that it became an established method, and is therefore retained by...
Page 86 - ... form a very hard varnish, but what have too much colour not to injure the whiteness, when laid on of a due thickness over the work, except some very late discoveries which have not hitherto been brought into practice.

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