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Friday, September 5, 2008

The Combined Technique of Gouche and Airbrush =part 1=

Drawing Tools

01. This rough sketch is used as the original base for the so-called perspective drawing as the actual plan is not available. The stylish modelling and wide windows are distiguishing here as the model is a restaurant with a night scene as a backdrop. A large amount of space was taken for the 'ceiling in order to display the vaulted interior. The fresco and skylight will be laid out in this area.
02. Copy this sketch onto the illustration board. Apart from the vertical lines, the sketch is hand-drawn which makes the drawing quite rough, but the details will be altered during the color­ing stage.

03. Apply a masking film to the drawing. the masking film used here is of Toricon make and is a strong adhesive SP200 type. Carefully apply the film from the centre in all directions and press out all air bubbles and creases.
04. Cutting. Basically the coloring will commence from the wide­ open areas. Cut out the masking surface in order to correct the unclear lines on the sketch. As the end result of the airbrushing,will depend on the accuracy of the cutting proccess, a great deal of care should be taken here. The cut-out portions of film should be lightly stuck onto a spare piece of paper for later use.

05. Coloring. Azure blue and ultra-marine of Nicker's gouache are used for the undercoat of the carpet. The colors may be controlled by adding white to the gouache. Paint swiftly and evenly without leaving any patches with the use of a flat brush. This will require special attention as the airbrush will leave patches on any uneven surfaces. Hereinafter the makes of airbrushes will be ab­breviated to the following: Nicker=(N), Windsor & Newton=(W), Holbein = (H). Additionally, individual makers will be indicated simply as gouache and transparent colors will be known as transparents..
06. Airbrush, Test the spray, Use ultra-marine (N) and royal purple (N).

07. The advantages of using an airbrush are the capability of simplifying the uncontrollable stages of color graduation, and expressing the texture of materials by controlling the size of the particles. The distance is of expressed by spraying coures particles of paint onto the fore of the carpet,
08. Check the color tones. Wipe away the excess paint on the masking surface in order to confirm the change in color. This must be repeated at each stage of spraying.

09. The first coat of the carpet, The initial step is complete.
10. Airbrush sand blasting, Sand blasting is considered to be one of the most important techniques of airbrushing, This is done by the use of the pressure controller on the compressor or the finger adjustments on the hand-piece lever (some hand-pieces have lever adjustment functions and some are adjusted by the nozzle),

11. Sand blasting is applied on the fore section of the carpet with the use of black (T) in order to emphasize the texture.
12. Once the airbrushing is finished, Tripub (water-paint fixing solution) is sprayed onto the airbrushed surface. As gouache is used here for airbrushing, masking film cannot be applied onto the surface without the processing. Tripub-A supplements the weak nature of the gouache by fixing the surface and lessening the problem of paint being stripped off by the application of the masking film. * Caution: Care should be taken to avoid spraying on too much Tripabu as there is a chance that the tone of color may be spoilt.
=== to be continued ===

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