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Register a new userA study of the effect of thickener type on fastness properties and color yield in printing
دراسة تأثير نوع المادة المثخنة على خصائص الثباتية و المردود اللوني للطباعة
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Authors
زياد سفور( باحث )
Created by
zeina alrostum
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تحتوي معاجين الطباعة على مواد مثخنة غالبا ماتكون بوليميرات طبيعية أو تركيبية . يكون دور المواد المثخنة تثخين المعجونة و إعطاءها قواما لزجا , و ذلك بهدف منع انتشارها العرضي و لتحسين دقة الرسوم . الهدف من البحث دراسة تأثير نوع و تركيز المواد المثخنة في معجون الطباعة , باستخدام أصبغة الأحواض بإجراء ثنائي المرحلة , و ذلك على كل من خصائص الثباتية و المردود اللوني . المواد المثخنة المستخدمة عادة في هذا الإجراء هي ألجينات الصوديوم و صمغ الغوار و إيتر النشاء . تبدي الوصفة التقليدية لمعجون الطباعة في هذا الإجراء انخفاضا في الثباتية تجاه الاحتكاك الجاف و الرطب عند الطباعة بألوان غامقة . تم العمل على استخدام مادتين مثخنتين فقط و بتراكيز مختلفة و من ثم اختيار الثباتية تجاه الاحتكاك . تم قياس اللزوجة للمعاجين المختبرة لما لها من تأثير على نفوذ معجونة الطباعة عبر القماش و بالتالي تأثيرها على المردود اللوني للطباعة.
Print pastes contain thickeners ''thickening agents'' that are often natural or synthetic polymers. The role of thickeners is thickening of print paste and making it more viscous to avoid lateral diffusion and improve finesse of motifs. The aim of this paper is to study the effect of type and concentration of thickeners in print paste (using vat dyes and Two-stage method) on fastness properties and color yield. Thickeners used usually, in this method, are sodium alginate, guar gum and starch ether. Conventional print paste recipe applied in this method give low fastness to dry and wet rubbing when we print in dark shade. We used only two thickeners in various concentrations, and then the fastness to rubbing is evaluated. The viscosity of print pastes is measured because of its effect on the penetration of the print paste across the fabric, thus its effect on color yield.
References used
Barnes H. A., 2000 - A handbook of elementary rheology. University of Wales, 350p
Dupont G., Zogu S., 2008 - L'impresion des textiles. L'industrie Textile, Paris, 222p
Miles L. W. C., 1994 - Textile printing. Society of Dyers and Colourists, 309p
ROUETTE H. K., 2000 - Encyclopedia of Textile Finishing. Springer, Aachen, 2777p
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f 3 months, and the patients were monitored patients using the form author 3 parts of a demographic data and the activities of nursing care and monitoring the occurrence of complications. Results: The results showed the effectiveness of the application of the policy of nursing care, including exercise program in the prevention of the occurrence of complications during hemodialysis, effectiveness of exercise in the prevention of complications during hemodialysis, regardless of the activities of the sports program applied.
Conclusions: conclude from the study that the application of the policy of nursing care, including exercise program contributes to the prevention of the occurrence of complications (high / low blood pressure, nausea and vomiting, muscle spasm) during a session of hemodialysis.
This search aims to study the effect of additive materials ( Ethyl Methyl Keton
Peroxide MEKP , Cobalt Naphthenate ) at the important values of (stress-strain) curves
( stress and elongation at break ) for the preparing specimens from reinforced an
d nonreinforced
with fiber glass unsaturated polyester resin.
The result showed that the investigated parameters are clearly affected with using
additive materials and the optimum concentration for non-reinforced specimens which was
curing in room temperature was (1% MEKP + 1% Cobalt Naphthenate) and (0.8% MEKP
+ 1% Cobalt Naphthenate), and for reinforced specimens with fiber glass was:( 1% MEKP
+ 0.8% Cobalt Naphthenate) and ((0.2-0.4) % MEKP + 1% Cobalt Naphthenate).
The results showed also that it is possible to get the better values of tensile stress at
break when the specimens was curing in oven at 100 Cº and treated at this temperature for
15 min.
Monodispersed CdSe nanoparticles with sufficient luminescence intensity have been prepared by chemical method in solution phase, and in two forms: CdSe as a core covered by Olic acide as an organic capping agent, while the second form is CdSe as a co
re covered by a layer of CdS (CdSe/CdS core shell). The nanodots size obtained directly from high resolution transmission electron microscopy (TEM) and absorption peaks using Paul Mulvaneys formula are in good agreement. The optical properties and the luminescence intensity as a function of CdSe concentration and the type of solvent have been investigated. The intensity of photoluminescence peak decreases and the peak shifts toward the blue energy side as the concentration reduced
It was found in this research that the seismic response of the
structure increases with the decrease in the shear waves velocity in
the soil, and the seismic response of the structure increases with
soil layer thickness between the foundations of the structure and
bedrock depth.
It was recently noted that there are
serious trials to develop dental materials used in the prosthodontics.
As a result of this development, some veneering ceramic systems
used in metal-ceramic crowns have been appeared. In view of the
major impo
rtance of marginal fit and its role in the success of
restoration it must be a study and evaluation of marginal fit for these
modern systems.
This research aimed to comparasion of marginal fit for metal ceramic
crowns using two types of veneering ceramic.
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