Selasa, 13 September 2016

The issues in Screen Printing and the Remedies

Publishing from screens prepared through paper, silk and others are among the efficient printing techniques in the current society. However , the publishing technique poses some difficulties to amateur printers. Therefore, solutions to some of these problems within screen printing have been recommended. Most of the problems that are likely to result from screen printing are:

(i) Bleeding of colours
(ii) Bumpy gaps left between repeats
(iii) Irregular placement of displays or block/leaking screens as well as soiling of clothes
(iv) Development of colour patches within the cloth
(v) Pin gaps

i) Bleeding of colours might occur when the pigment (printing paste) used for the stamping process is watery. When the pigment watery, during making, at every registration, the color will bleed to the encircling areas of the motifs therefore spoiling the printed towel. To solve that problem, the actual printing paste must be thicker enough so that at every sign up, the pigment will go through the fabric. Also at every enrollment, the under part of the display screen must be cleaned.

ii) Sloping gaps left between repeats may also occur when the signing up of the screen is not determined. If the registration is not computed, subsequent repeats of the style may not join thereby making gaps in between the repeats. The problem could be solved through checking the repeats before producing starts. The repeats could be checked by using a coloured chalk to mark the various repeats on the fabric so that each and every repeat one will know where you can place the screen. Another option would be, a coloured strand may be placed at the edge of the design widthwise so that the screen could be positioned directly on the strand once the repeat is registered, the particular strand will be removed and also the design will be printed.

iii) Irregular placement of screen may possibly occur if the repeats aren't checked. To solve it, typically the repeats have to be checked prior to the placement of the screen is completed to register the print. Obstructing /leakage of screens and also soiling of cloth may also happen when the edges of the monitors are not blocked. If the sides are not blocked, the publishing paste will leak with the edges and soil often the cloth. This is solved simply by using a masking tape to strapping around the screen before stamping starts.

iv) Formation associated with colour patches on the fabric may occur if the color is not distributed evenly around the screen. To solve this problem, sufficient pigment has to be used so the paste will be evenly distributed to avoid this patchy effect. Additionally, the pulling of the squeegee must be well done.

v) Pinholes may occur as a result of these:

(1) The mesh utilized for the screen may consist of some oils or gumline and dirt in it. Whenever the development of the screen is performed, because the silk was not cleaned to remove the dirt along with other foreign matters in it, it is going to block the light from getting through so during washing, all those portions would be washed away thereby creating pin-holes generally there. This could be solved by cleaning the mesh to remove each and every impurity before stretching this onto the screen.

(2) Pinholes may occur if you find under exposure of the display during developing i. electronic. during the development of the monitor, the due time for the actual screen to develop will not be adequate or would not reach as well as the screen would be washed. In case that is done, the chemicals may not develop enough on the tv screen so during washing the majority of it would be washed off, producing pinholes. This could be solved simply by allowing the screen to build up well, that is to reach the particular due time before it really is washed.

(3) Coating from the screen can also create pinholes in the screen. This is whenever the coating is not done well most especially when it is done as soon as. After washing of the display screen, there would be pinholes in the display. This could be solved by covering the screen twice or even thrice before developing is conducted.

These suggested solutions to typically the identified challenges are proven and born from the encounters of skilled screen ink jet printers. Therefore , printers using window screens who confront the same or perhaps similar challenges can use these suggestions. svg image library

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