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Colour Separating a Design by Hand
This process is best performed using a light box or against a window, where light will shine through the design, highlighting the areas to be copied.
These are vital to register all your different layers.
Place a sheet of thin paper over the original picture and mark your 4 registration marks onto the new sheet of paper. Draw the outlines of the areas to be coloured with a yellow pencil and then shade in the areas to be coloured with a RISO Carbon Artwork Pen [fill with ‘texta’ if it is to be photocopied].
Repeat the previous step for each new layer/ colour separation you require, so that each colour is on its own piece of paper and all sheets have the registration marks.
Below is an example of a simple two colour separation:
Separation #1 Separation #2
By taking multiple copies of your original design, each separation is created by blocking out parts on each layer. This process is more accurate than tracing the design as each design is identical, however blocking requires more thought and delicate separations as complex designs [5 colours or more] can get confusing - what needs to be removed from what layer, etc.
Important - Name Each layer [on the top or back] so you know what to remove from each separation.
You must now block out using correction fluid [or cut with a sharp knife] the areas on each separation that are not required. Repeat the process for each photocopy/ separation.
When you have finished all your separations, take a new photocopy of the design and use this as your artwork when imaging your screen. Remember to perform the Artwork Clean-Up Procedure on the photocopy before imaging your screen.
Registering Your Layers & Prints
It is important to line up succeeding screens precisely, each and every time. Most people develop their own simple form of registration depending upon the equipment they have available, however here’s a few simple guides to help you get started:
Place a copy of your original design over your item, in the correct printing position. This becomes your ‘home’ position and you will line up each of the screens over this design.
PRINT GOCCO - We do not recommend attempting this style of printing unless you have a PG-11, CD-Printer B6 or PG Arts for Paper system with advanced print registration features. Gone are the days of the old registering attempts by matching the registration marks exactly - not impossible but very time consuming.
Screen Printing - You can register designs by hand or using a screen printing jig.
By hand - When a jig is not available Screen Master is fairly transparent enabling you to view through the screen and align the designs manually. By hand is a time consuming process as you must ensure the registration of each screen before printing.
By Jig - Each screen is placed into an arm of the jig and then registered over your original design. The arms are locked in and registration is complete. Full details on IS31 Registering Multiple Colours in a Jig