printing defects causes and remedies pdf

1. 13 0 obj >> It is the holes created on the external surface or inside the casting. << Ghosting is usually considered the presence of a faint image of a design in solid printing areas that is not intended to receive that portion of the image. >> >> /Contents 65 0 R /Image4 41 0 R endobj /Image21 51 0 R 26 0 obj Common Defects A paint defect is in many cases due to a number of causes. /Type /Page /Subtype /Image << Printing Techniques and Defects Printing has often been described as dyeing in a localized, patterned design. endobj << /ModDate (D:20140102070729+05'30') /XObject << %PDF-1.5 Anilox Roll Selection /Creator 25 0 obj >> /Type /Page /Font << /F2 44 0 R 24 0 R 25 0 R] /Annots [33 0 R 34 0 R 35 0 R 36 0 R 37 0 R 38 0 R 39 0 R] 14 0 R 15 0 R 16 0 R 17 0 R 18 0 R 19 0 R 20 0 R 21 0 R 22 0 R 23 0 R H�tUM��6��+��@�|���$Ѭ)Q#�a�7m���f;�7�Se�{z�-0.�U�{��no2��E)K���30x��.�c�'|������8px6����G,���(�!�W|Nң������{�TE�0cQ�Q�ž��ќU4��*�0�!����Ӑ£����=�?��|A��6�oٝm�?�ޮ�9p�[��n1>⢂�J"�C���7c��s� 29 0 obj /ML 4 /S /Transparency /Type /Pages /ca 1 �y~[m}�M���+������Lq����xx��f��~��A�� ��|� �p�2���u��7ݼ�����j�Q��wLѰ7���@d���1=Zr�' /F2 44 0 R Common Metal Casting Defects Introducing various metal casting defects with many pictures by Dandong Foundry in China. /F2 44 0 R /XObject << >> Microscopic defects such as flaws and voids can act as stress concentration sites and are detrimental to strength of the materials. /Type /Group /XObject << /Resources << /Contents 76 0 R >> /F5 31 0 R << �jm;��KC� ( qj'���$��/�ڂ�k͖���*�۬+zLoQ�e]��ㅓ�Π �K���ǶV���3�Pq+l:���lsZq��fI80��/H�丮u.2r�. /F2 44 0 R Res. /rgid (PB:277324334_AS:234249202696192@1432860770852) Improperly set or worn rollers. /F3 45 0 R >> /S /Transparency /F3 45 0 R To take preventive action against these common causes a machinist must know the possible remedies of the common causes. << /S /Transparency 3.Dried ink 3. They must be able to resist swelling and delamination caused by inks, fountain solutions and washes. /Parent 2 0 R Defects garments production garment defects causes and remedies. /Image4 41 0 R /F1 43 0 R endobj So below we’ll learn about the 7 most common welding defects, their types, causes and remedies. /F3 45 0 R In ceramic components fabricated by inkjet printing, defects in the form of voids typified by Fig. /Parent 2 0 R << /Image32 59 0 R /F6 77 0 R Improperly packed cylinders. /CA 1 In the process, there can be deviations in the shape and size of the metal structure. endobj It can be caused by the use of the incorrect welding process or wrong welding technique. /Type /Group 4. /F1 43 0 R /Parent 2 0 R endobj /F1 43 0 R /MediaBox [0 0 612 792] /Image10 42 0 R /Image4 41 0 R 19 0 obj >> /Image10 42 0 R 21 0 obj /Font << /F5 71 0 R /F2 44 0 R endobj /Image48 68 0 R 9-(�l���Q8�"Sn�x�X��g����~K%��B@��N�zS;d�!3Q�g�(okJ �W1���,��m#׏�X)��K�8p�&3�F�����������q}h[§Vպ�W뗏��ZHo� ���p(��!�+����Y�m /������'���O�ߴ>��Rq)��L(������J��RV��q'�cV0����H�l�볿y]��{Q�I0�r�b4kAZ���O�>���V�� ^(�@�F��}_9�ض�Hp#��s��r�ڽLK�:E���5�R�d���p�5�2u6�{�x�w�����%���I:8�7g�z���u˫[**����r�;f S�� G�|.���?���7�� �V��6N)�{vѝ-��r[k�����xKP"�KN�< �;�;������>����mZ��̙cL0F�!��t�������z����8��������07��Ǻ���~���RN(AL�a��R� /F3 45 0 R 24 0 obj Causes: Flow line defects are caused by the varying speed at which the molten plastic flows as it changes direction through the contours and bends inside the mold tool. /Tabs /S >> /F1 43 0 R /Length 1753 >> /CS /DeviceRGB /Type /Group /Group << /Producer >> /MediaBox [0 0 612 792] Percentage of Knitting Faults in Lacoste Fa bric %���� endstream endobj 4 0 obj << /Type /XObject /Subtype /Image /Width 737 /Height 962 /BitsPerComponent 8 /ColorSpace 136 0 R /Length 25308 /Filter /FlateDecode >> stream Check oven for down draft on cylinder. /Resources << /XObject << /F4 64 0 R /Resources << endobj /F3 45 0 R $@���@�׍�w�X����@�H�J? /F2 44 0 R /Type /Page >> /F2 44 0 R /Tabs /S /F2 44 0 R /F1 43 0 R /Group << /SA true �P��NJD�Hp�/��� �\�[�� /=f+�qi[ /Image10 42 0 R /XObject << /Resources << /Image20 50 0 R >> 23 0 obj /ProcSet [/PDF /Text /ImageB /ImageC /ImageI] ’z��_��u�]�-H�T��j��1H,�o�18�.C�fd�1��1�v�s������0T�L�o��*u'�Z���o3�aeR~;��Bd�h,?8t�Lh���>���n�X(#(e�Qh�\�R�4�uY����[o�K�K��'��NpG��k��s��Ǝ?~���ʉ1q�R2�_yk�kn�Z�������!� /F3 45 0 R /MediaBox [0 0 612 792] The following list provides helpful remedies for common issues that may be encountered. /Author (USER) >> ���� JFIF H H �� C ! /Image10 42 0 R >> 6. /F4 30 0 R Author Mike Thibault (Vice President of Technical Services for leading Canadian pressroom chemical manufacturer Unigraph International), has been at the forefront of solving printing quality issues and reducing downtime in pressrooms across North America for over 33 years. >> Applicator 1. Remedies: Try a lower tack or lower set rate of ink. /Tabs /S Check solvent mix of ink 5. Sewing section is the most important department of garments manufacturing factory. ���1g)��0���I[�e�RX��������bB�I��v����Q�*�&�1��sL4%Q�$���5�� o'����,�/��}��w�f��zK*��z�m�D:����S���:�����\Bp@�O!�e+�0�"�(�X��~Ro�����dד���ޝ���s�f�B�F��d8� ����Db|F�1g�QMi�ż���n#��R��P©��f.�vq�,$8)���1#h��Q��eJn'L��PO���s#�� 5%$�nFlz'TS���w�J�#+x9�@�1������P�\H�MA�L�$N$����k���य़Ol�������=Y#�6���!n�e�R���%q��������S]X�>�_�Ǎ�>f��A�a�8'�v��%�I�����+k�����E��u�.�BQ�#XQ0��%cfr%%��p������O�;��2�o��-l�s �`UF"�� >> >> Tolerance limits for defect (size, repeatability, quality, significance) will be defined later. B�����.�&(��S�g9 �'pF50�',�byT�n�� "�u˗�� >> Change ink. /GS87 90 0 R /Kids [4 0 R 5 0 R 6 0 R 7 0 R 8 0 R 9 0 R 10 0 R 11 0 R 12 0 R 13 0 R Even though, to ensure a consistent batch to batch production of shade the following matters should be controlled carefully- Causes: Use of different brand dyes and chemical. Defects are common in any type of manufacturing, welding including. /Image26 54 0 R /Image42 63 0 R /Type /Group /Parent 2 0 R /Group << endobj endobj /Font << /Type /Group /Font << /Type /Group Even when there is a problem, the floor doesn’t have to be a failure. /Image10 42 0 R /CS /DeviceRGB /Type /Page /ProcSet [/PDF /Text /ImageB /ImageC /ImageI] /Image4 41 0 R >> Blowhole and Pinhole This is a kind of cavities defect, which is also divided into pinhole and subsurface blowhole. Instruct weavers and supervisors to periodically check fabric to remove double ends. >> /F2 44 0 R Bring the defect to the notice of the drawing-in operator. /F1 43 0 R The example below is taken from a magazine article. /Group << /Image4 41 0 R /Contents 84 0 R >> /Parent 2 0 R >> endobj �+��уbz�!�J^ ��€�4�N�Vó /F2 44 0 R /F1 43 0 R /Type /Group /Font << Minor Defect – A defect that does not reduce the usability of the product but is nevertheless a workmanship defect beyond the defined specifications or construction requirements. /CS /DeviceRGB >> /Image27 55 0 R /Resources << To achieve good painting work, applicators and site supervisors should understand the causes and preventive measures of common defects that occur at >> 22 0 obj Defects , Causes and the Remedies Adhesive Coating is a simple process There are various methods available for the same. >> 2 0 obj /Type /Group >> Non-compatible additive that is less dense than ink Solution: 1. /Parent 2 0 R /MediaBox [0 0 612 792] Most anilox roll manufacturers will recommend running an anilox roll with an LPI at least 5 times the printing LPI. /F3 45 0 R /CS /DeviceRGB /F4 64 0 R /S /Transparency /Font << /MediaBox [0 0 612 792] /CS /DeviceRGB After treatment ↓ Fabric Unload 2.3 Shade variation (Batch to batch): Batch to batch shade variation is common in exhaust dyeing which is not completely avoidable. 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