LyzerPrint PR

(Resist printing agent)

Resist printing agent for printing of Reactive dyes
(di chloro cyanuric type e.g. Procion dyes of H series) as illuminating colours, under reactive dyes (Vinyl Sulphone type e.g. Remazol dyes) as ground colours. Dark colours like black, coffee, olive green, navy etc. can be used as ground shades and bright red, orange, yellow, crimsons etc. can be overprinted as illuminating shades.

Physical & Chemical properties
• Light brown free flowing powder.
• Typical Harmless odour.
• Shelf Life over six months.
• Chemically reacts with Remazol type of colours to form adduct which is more water-soluble. Adducts do not have reactivity to cellulose. With Procion type of colours no adducts are formed.
• LyzerPrint PR is anionic in nature, freely soluble in water having alkaline solutions.

Conventional resist printing on Remazol Colours are obtained by using organic acids like citric acid / tartaric acid as resisting agents and pigment colours as illuminating agents. However, pigment prints give undesirable harsh handle and improper rubbing fastness properties. Resist printing with LyzerPrint PR allows the use of procion colours as illuminating colours. Conventional vat discharge allows fully developed Remazol grounds to be used for discharge printing, thereby reducing damages due to water spotting before steaming, compared to resist. However; in resist printing with LyzerPrint PR, the following advantages over vat discharge are observed:

• LyzerPrint PR is cost effective: Procion Colours are cheaper than Vat pastes & have stronger hue compared to vat pastes. LyzerPrint PR required in resist print is 4 to 8% compared to 10 - 16% of rongalite (costlier than LyzerPrint PR) in discharge paste. These factors reduce chemical cost. With LyzerPrint PR, effects similar to discharge are obtained in one run of printing machine starting from undyed cloth. The cloth movement to dyeing machine and subsequent delays, additional steam & water consumption in dyeing operation etc. is saved.
• LyzerPrint PR style produces lesser second quality: LyzerPrint PR is less hygroscopic compared to rongolite. This produces less meterage of second quality especially in rainy season. LyzerPrint PR has better stability over rongolite. Hence prints can be stored for longer time before fixation, (if necessary), without fear of losing activity. This gives better departmental adjustments.
• LyzerPrint PR gives brighter illuminating effects with Procion Colours than Vat pastes.

In the ideal method, goods are first required to be resist printed either white or coloured. The detailed recipes of resist pastes, are given in following table (column nos 2 & 3). Printed & dried goods are then nip padded with Remazol colour solution (col no 1 of table below) or over printed with blank screen using Remazol colour pastes (see col 1). Non continuous objects (like Koyari) are also being printed with Remazol ground pastes.

Steaming for 10 to 12 minutes at atmospheric pressure carries out fixation of prints. Silicate Padding Method is not suitable for fixing colours as it gives double impressions of LyzerPrint PR*(Read foot note). Washing of prints is as usual (The washing procedure may be refereed in our literature of LyzerKlin RCD). The cloth is then dried and finished.

Different methods of printing:

1. Resist print (Rcp Tbl col 2 & 3)– Dry - Nip pad (Rcp Tbl Col 1)- dry -steam.

The resist-printed cloth is padded with printed face up, remote from kissing roll to avoid double impression.

The printed face of the cloth after nip padding should not rub on guide rolls before drying to avoid double impressions. Minimum guide rolls should be used, or infra red dryers may be used before the cloth is passed over the guide roll.

2. Pad (Rcp Tbl Col 1) - Dry - Resist Print (Rcp Tbl Col 2,3)– Steam – Wash

The first method is always a better method but where nip-padding facilities are not available this particular sequence is useful.

The cloth is padded through the ground colour solution & dried at low temperature. Bone drying or drying at high temperature fixes the colour partially & resist effects are not clear. Padded goods must be over printed immediately or as time passes, partial fixation of colour takes place.

The cloth is then printed steamed & washed as usual. Silicate method of fixation may be useful with procedures is given in footnote below. The recipe to be used for Remazol colour is without bicarbonate in silicate method. This reduces over drying effect of ground shades before printing.

3. Print over print Method

Resist print – semi dry - over print with ground colours – dry – steam – wash.

Ground with full coverage can be printed to get dyed like effect using blank screen. Joint marks can be carefully avoided or adjusted in designs in white effects.

Non continuous ground with objects can also be printed instead of continuous ground to get beautiful effects. These Remazol pastes can be printed as the last screen in the same run of resist prints.

Goods are then dried in drying range carefully, without prints getting rubbed on guide rolls. Goods are steamed washed & finished as usual.

4. Print over print Method - Conversion Style

In this method it is possible to use 4 screens and get six-colour design with a magical fitting.

The method involves first printing of white resist paste (see recipe below) with LyzerPrint PR. For white resist, single screen with light to medium coverage is preferred having natural designs.

The same is then over printed with ground pastes with mix colours(Remazol + Procion) with some engineering type of design with heavy coverage. Mix colour pastes having olive, mustard, coffee & rust like ground shades are obtained by using Remazols (like black or blue) + Procions (like yellow orange or red) of different combination. The typical recipe is given in column no. 4 in table below. Wherever white paste is printed, Remazol colour will get removed from the printed area and bright procion colour motifs will be left. The joint between mix shade and procion shade is otherwise difficult to print. Selection of objects in resist screen should be such that it runs over no of mix shades print area. The object, then changes colour when it crosses each mix shade without joint marks.

Notes:
Sodium Alginate is suggested as a standard thickening, however other gums could be used for lowering costs if the feel of prints is acceptable.

LyzerPrint PR is a resisting agent, the amount of which is required to be predetermined for each type of style and depth of Remazol colour in print. In general, for white resist, light ground shades require 5% of LyzerPrint PR, medium shades require 6% to 7% and dark shades require 8% , very rarely up to 10%. Printer has to set a recipe by initial trials. In white discharge, if amount of LyzerPrint PR is insufficient then the ground will not be cleared completely and when it is more than required it gives a hallow mark around the print area. One has to decide the amount of LyzerPrint PR in such a manner that it should clear the ground completely and simultaneously; it should not leave excessive hallows. Slight hallowing may give resemblance to vat discharge , especially in colour resist. For colour resist the amount of LyzerPrint PR required may be reduced for medium to dark grounds by 0.5 % to 1 %., compared to white resist.

Sodium bicarbonate is an alkali for fixing colour used in Remazol solutions & pastes. This may be removed if the goods are to be fixed by silicate method (see note below). Bicarbonate is also not required for pastes containing LyzerPrint PR, as it provides for required alkalinity.
Recipes of padding solution & Resist Pastes.
 

	Padding Soln Or Paste P/1000	White Resist Paste P/1000	Colour Resist Paste P/1000	Mix Colour Paste P/1000
Dye(Procion)	NIL	NIL	X	X
Dye (Remazol)	Y	NIL	NIL	Y
Urea	50	NIL	NIL	Y
Hot Water	200	NIL	200	200
Alginate Paste 4 - 6%	50 (Soln) or 600 (Paste)	600	600	600
LyzerPrint PR	NIL	50 to 80	40 to 70	NIL
Sodium Bicarbonate	20	NIL	NIL	20
Water/ Alginate paste	Q	Q	Q	Q
Total	1000	1000	1000	1000

 
Limitations of LyzerPrint PR

Remazol Tur. Blue & Remazol Brill Blue R does not give good white resist. However they are suitable for colour resist. It is suggested to test all ground colours before bulk trials. Remazol Black colour gives good white on cotton; however; on viscose it gives light mow colour. This; however; does not affect colour resist. other Black colours or suitable combination of colours giving black is suggested. In Procion colours, some loss of colour value is seen in all colours in presence of LyzerPrint PR. In spite of this additional undesirable cost; the effect produced is excellent. In Procions, Yellow H4G is not very suitable as there is excessive colour loss with LyzerPrint PR. However; it is still being used as there is no alternative. Procion T. Blue also shows some loss of colour.

Silicate padding limitations & few methods to overcome the same:
LyzerPrint PR is soluble in silicate & hence gives double impression, as indicated earlier. The difficulty may be overcome by following methods.

The goods after silicate padding may be taken in roll form along with a plastic sheat covering the print phase. Plastic paper is run along with the cloth from different guide roll continuously & taken along with cloth covering print face, in roll form. At the end few layers of plastic paper are further wound & the sides of the total roll are well covered such that it avoids air-drying.

In hand process it is a practice to pad or deep a sari length of print with silicate, and spread over a plastic paper kept in a tray. Over this, another plastic paper is laid and then another silicate padded sari. Thus a stack of saris and plastic papers are further well-covered and kept overnight for fixation.

The silicate padded goods are kept overnight & then washed as usual. Needless to say that plastic sheets after proper cleaning and drying can be reused.


STORAGE: The product enjoys very good shelf life and warrants no particular storage conditions. However it is always advisable to have moderate conditions with the container being recapped tightly after use. 9 to 12 months if stored below 30°c.

Packing:
30 & 50 & Kgs in Plastic Container.
 
Note:
According to our best knowledge and technical experiments, the above data is true and accurate. Regarding to variety of consumption procedures, it is recommended to evaluate the information before use.