paint for all brick, stucco, or concrete shall be mixed ac cording to the following formulas: Priming hundred pounds of white lead; 9 gallons of pure boiled linseed oil (or 9 gallons of pure raw linseed oil and 11 pints of tur pentine dryer) ; 1 gallon of turpentine. Body hundred pounds of pure white lead; 4 gallons of pure linseed oil, one third boiled, two thirds raw (or 4 gallons of pure raw linseed oil and 1 pint of turpentine dryer).
Finishing Coat. — One hundred pounds of pure white lead; 37 gallons of pure linseed oil, one third boiled, two thirds raw (or 3i gallons of pure raw linseed oil and 1 pint of turpen tine dryer) ; 1 pint of turpentine.
Strictly kettle-boiled linseed oil should be used as specified whenever possible, especially on stucco and con crete, because it is less liable than raw oil to degenerate under the peculiar influence of lime, cement, etc. if strictly kettle-boiled oil is not avail able, use the alternative specifications for raw oil and a dryer.
Specifications for Painting Steel and Ironwork. —Before erection.— Before it leaves the shops, all steel and ironwork shall be thoroughly cleaned of all mill scale, dirt, rust, and oil, and receive one coat of red lead paint mixed according to the for mula given below. Surfaces which will be inaccessible after structure is erect ed shall receive two coats of this paint before erection.
Formula.—Pure dry red lead, 30 to 33 pounds; pure raw linseed oil, 1 gal lon.
These ingredients shall be thor oughly mixed no longer than twenty four hours before being used.
After Erection. — All structural ironwork shall be cleaned after erec tion and all abrasions in first coat of paint brushed clean with a stiff wire brush and repainted. All surfaces shall then receive one additional coat of red lead paint prepared according to above formula.
All pipes, including automatic sprinklers, steam and hot-water radi ators, conducting pipes, and interiorly exposed structural metal work shall receive two coats as above. Fire es capes, smokestacks, gutters, down spouts, and all other interior metal work shall receive three coats as above with 1 pound of pure lampblack, ground in oil, added to every 28 pounds of red lead used in the third coat.
Subsequent coats on exposed metal work shall be of strictly pure white lead and linseed oil, tinted according to the color scheme employed in the building.
Paint shall not be applied until pre viously applied paint is thoroughly dry.
No painting shall be done in wet or freezing weather.
Specifications for Painting Metal Roofs, Cornices, etc.—New Work.— All new metal, tin, galvanized iron, iron, or steel, used for roofing, cor nices, valleys, gutters, down spouts, iron railings, gratings, etc., shall be painted according to the following specifications: Before Painting.—All surfaces shall be carefully cleaned by scrubbing with sand soap and water, and thoroughly dried, before paint is applied. Only when this is done will the paint ad here properly to the metal. This is very important.
Formula. — Pure dry red lead, 30 pounds; pure boiled linseed oil, gal lon; pure raw linseed oil, gallon; pure lampblack ground in oil, 4 ounces.
Mixing. — The materials must be thoroughly mixed before application. The mixture shall be of uniform con sistency and stirred frequently while in use.
Application.—All surfaces shall re ceive two uniform coats, as above. When necessary to follow color scheme, finishing coats of pure white lead and linseed oil, tinted to suit, shall be applied over these coats. Each coat shall dry thoroughly before the next is applied. Paint on under side of roofing shall dry hard before roof ing is laid.
Old Work.—Metal surfaces not new shall be thoroughly cleaned with wire brush, removing all loose paint and particles, and then painted as above.
Specifications for Painting with Zinc White.—Outside.—Any of the following combinations may be used at discretion: Combination " A."— Primer, pure lead; second coat, pure lead; third coat, pure zinc.
The primer may be tinted with not more than 1 per cent of pure lamp black, ocher, or umber in oil. This applies to all combinations, except where the final finish is to be white.
Combination pure lead; second coat, zinc, lead; third coat, pure zinc.
Combination " C."—Primer, pure lead; second coat, i zinc, lead; third coat, zinc, lead.
Combination "D."—Primer, zinc, lead; second coat, zinc, lead; third coat, zinc, j lead.