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CONTINUAL IMPROVEMENT PROGRAMME 1st March 2013 For internal circulation only Phase - III Vol.:XII Painting – Part 2 3. FINISHING WOOD WORK : 3.2.1.4 On clean prepared surfaces, wood primer is to be applied by brushing, covering all areas uniformly. Surface Wood work is generally finished in five different ways - preparation is as stated above. White or pink primer is as a) painting with synthetic enamel paints [alkyd based in oil] per specification. b) painting with poly urethane based transparent paints [like asian paints' 3.2.1.5 Two primer coats are necessary mainly because of time touch wood or melamine] lapse between making the joinery and fixing in position. Besides while fixing the joinery work [ddors and windows] c) french polish or varnish - transparent finish again with spirit varnish in masonry or concrete, cement mortar and dust are likely [xylene or alcohol based] to settle on the wood work. d) shellac polish – red lac in spirit or oil 3.2.1.6 Again another time lapse may [generally] take place before e) wax polish - linseed oil and bee wax or tung oil with or without colouring final painting on these members are taken up after fixing in pigments The synthetic enamel finish offers protection to wood, position [making done parallel to RCC frame work, then completely covers the natural grains or texture of the wood [may be walls are taken up during which these frames go into many may not like this]. Other finishes retain the wood's natural grain position. After plastering & floor finishes are done, this appearance and at the same time offers protection to wood. So these finishing to wood work is taken up. Thus lot of time gap is finishes are preferred. Each application has separate procedures for there between activities.] the surface finish. 3.2.2. Synthetic enamel finish paint: 3.1. Preparation of Surface – common to all stated above: 3.2.2.1 After the primer, and before taking up finish paint two coats 3.1.1 All wood works are to be cleaned free from dust, dirt or any of puttying on all wooden surfaces is to be done. extraneous materials. 3.2.2.2 The procedure will be same as in masonry walls described 3.1.2 All loose or spongy or fungus materials inside the knots that are not above [except that plain surface area covered will be far removed while working on wood, are to be removed carefully and less and rebates, corners, and joints will be more]. the resulting holes to be filled with ready made wood putty or 3.2.2.3 Under coat or the first coat of finish paint is to be applied by specifically prepared chalk putty or wax [which does not interfere brush after the surface has been primer applied, stopped, with wood's final grain finish when transparent paint or varnish is puttying done, and rubbed to get a smooth surface. applied]. 3.2.2.4 After drying of the under coat, all surfaces are to be 3.1.3 All nailing pit marks and joint nailing wooden plugs positions are to carefully rubbed down with nice emery. This is to remove be properly filled. unevenness in first coat [if any], bubbles, and joinery is to 3.1.4 Flat portions are to be smoothened first with medium emery and be wiped clean before the finishing coat is applied. then with soft emery sheet [no 80 first and then 120]. 3.2.2.5 The finishing coat is to be applied by brush and nicely 3.1.5 The joints where grains of timber get crossed are to be specially worked upon, so that brush marks are not visible. taken care so that they finally do not spoil the appearance of the 3.2.2.6 The finished surfaces have to be uniform in colour, free whole work [one longitudinal going along and another joining with from hairs from brush, or brush stroke direction marks, cross texture at the joint]. paint drippings, streaks, clogging of paint, puddles in the 3.1.6 Wax wood filler is to be used for shellac transparent varnish finish. corner etc. And for polyurethane paints the ready made putty as 3.2.2.7 Turpentine or thinner is to be used to clean all surfaces recommended by manufacturer is to be applied. from paint drops immediately [before paint becomes dry in 3.1.7 Chalk putty in linseed oil is to be applied for coloured varnish. Or unwanted areas]. ready made varnish putty is to be applied. Note: o In both wood and metal surfaces, the final finish by spray painting can 3.2. Painting With Synthetic Enamel: [alkyd base with colours] also be done. After spraying, the finish will be more uniform and of even shade. 3.2.1. Wood Primer application for synthetic enamel painting on wood: o Wastage of paint material when using sprayer is also more. 3.2.1.1 Unless otherwise directed, one priming coat is to be applied when the work of preparing joinery is finished and o The worker protection measures have to more stringent when spraying is another after the wood work is fixed in their final position. done. 3.2.1.2 For all doors and windows, the surfaces coming in contact 3.3. Varnishing Or Polishing [transparent finishes]: with masonry or concrete are to be applied with 2 coats of 3.3.1. Colourless Lacquer Polish: Material: Polish Nitro cellulose lacquer wood preservatives [creosote oil or coal tar]. polish of approved brand and manufacture. Preparation of Surface: 3.2.1.3 While applying these preservatives, care is to be taken not a The surfaces are to be cleaned and all unevenness are to be to touch other areas with brushes soaked with these rubbed down smooth with suitable grade sand paper and well materials [those areas to be applied with primer and to be dusted. painted. because these two cause a strain on timber which cannot be removed so easily] b Knots if visible are to be made good. Holes and indentation on the surface are to be filled with glaziers putty. c The surface then is to be given a coat of ready made ragging without heating. To obtain required shade, pigment can be added wood filler and allowed to dry for maximum 4 hours. and mixed. d The surface again is to be rubbed to be perfectly smooth with Preparation of Surface : suitable emery paper and wiped clean. a Surfaces are to be prepared as stated above. All unevenness e Thereafter one more finishing touch up with ragging wood filler is are to be rubbed down smooth with sand paper and well dusted. to be given and allowed to dry. To receive the polishing the b Knots, if visible, are to be covered with a preparation of wax or surface is again rubbed down smooth. porbunder stone dust [yellow colour stone dust putty in water or Application: linseed oil]. i Nitro cellulose sealer coat [shellac is material and sheenlac is c Holes and indentations on surface are to be filled with putty brand name] of approved manufacturer is to be applied strictly as made of whiting and linseed oil. per the manufacturers specification. d Resinous or loose knots and gaps are to be filled with seasoned ii The polish is to be applied with a sprayer at suitable pressure and timber pieces and made level with rest of the surfaces. viscocity as recommended by the manufacturer, and allowed to e Surface is to be given a coat of filler made of 2.25 kg. of whiting dry for 4 to 6 hours and rubbed down with suitable grade emery. in 1.5 litre of methylated spirit. When it dries surface is to be iii The surface shall be again sprayed with 3 coats of NC lacquer rubbed again to be perfectly smooth with sand paper and wiped with time lapse of nearly 2 to 4 hours to allow drying of each coat. clean. iv Finally the surface is to be given wax polishing by using mansion POLISHING : polish [ready made wax rubbing compound]. i Piece of clean fine cotton cloth and cotton wool made as 3.3.2. Polyurethane based paints: Material: [Glossy / Matt finish]Apcolite rubbing pads are to be used to apply polish. The pad is to be Natural Wood finish clear glossy / matt is a premium quality moistened in liquid polish and rubbed hard on the surface. melamine coating, specially formulated as a protective and also ii The spread of the polish is to be uniform and completely decorative clear coating finish for wood. covering the surface. Preparation of surface : iii The coating is to be allowed to dry. Then another coat applied in a Sand the surface along the grains with Emery Paper No.180 or the same way. with a suitable grade sand paper. Brush the surface free of loose iv To give finishing touch, the pad is to be covered with a fresh dust. piece of clean fine cotton cloth, slightly damped with b Fill the wood using Apcolite Wood Filler. Remove excess filler mentholated spirit and rubbed lightly and quickly with a circular immediately after applications. Allow 2 3 hours of drying, before motion, till the finished surface attains uniform texture and high sanding with Emery Paper No.240 or 280. gloss. c If desired, apply Apcolite Natural Wood Finish upto 20% by 3.3.4. Wax polishing: volume and apply by spraying after Sealer Coat. Material: Wax polish is either to be prepared at site or obtained as d In application by ragging [applying using cotton or cloth pieces] ready made from market [mansion wax polish].

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