sulphur dye is made by sulphur linkage &vat dye made by ketone linkage. thus sometimes sulphur dye are used for basic dye in respect to mordant. that is called topping. when we shall break insoluble vat dye,then we shall get pigment.
Color difference is one of the difficult things to troubled our dyeing workers frequently, however the reason to cause the color difference is too many, below let us tell you how to control color difference on every processes in our factory： 1. Grey cloth detection stage It's very important to detect the Grey cloth: we should not only inspect width/ density of warp and weft, but also to check the outer quality of fabric ( such as weaving defection/ stain etc), we will mark the Grey cloth with different time, on dyeing we try best to use one batch fabric to dyeing same color, if we use different batch fabric, we should mark on the card, in case of any batch difference. 2. Fabric pre-treatment stage Grey cloth need to though pre-treatment, to improve the dyeing property. Pre-treatment is one of the main reason to cause width difference: boiling time/ temperature/ concentration/ scouring pressure control are the most important things, especially the detection of concentration which need professional person. Moreover, washing temperature also should be noticed, cannot lower or higher. 3. Dyeing stage Dyeing is also one of the main reason to cause the color difference. Generally padder pressure uneven/ oven width temperature difference is one of the main reason to cause color difference, dye vat width indicator difference also cause the aberration. Dye liquor on the dye vat didn't reach dynamic condition is also the reason to cause dye difference in the head and the tail of Grey cloth. If dyeing on the jig dyeing machine, we will put dyestuff / auxiliaries , especially the dye stuff against alkali. 4. Finishing stage Generally, if exclude above three possible reasons, you should to check sizing machine, because sizing machine 's pressure uneven, especially light color variety, will cause aberration. 5. Equipment selection Different equipment tension, and water pump lift strength will cause aberration. 6. Personnel selection Operator's skill higher or lower will also effect the textile's aberration, so we always choose higher skilled / higher quality / better operator to handling the equipment.
Extract the sugar and feed it to yeast (in a fermentation vat).
vat dyes acid dyes
Most sulphur is used in the production of phosphate fertilizer. Liquid sulphur us burned to produce sulphur dioxide gas which then goes through a catalytic process to produce sulphuric acid. This sulphuric acid is then used to leach the phosphate from phosphate rock. The phosphate is then used to make phosphate fertalizer. The reaction leaves a byproduct of gypsum. If you ever see a phosphate mine or a facility that processes phosphate rock you will notice the acres and acres of gypsul piles surrounding the facility.
Depending on the size and shape of the sample, powder coating springs to mind Also dipping in liquid PVC works well if the component is small enough or the dipping vat large enough. Hand tools work especially well for this.
generally vat and sulphur dye principles are same. indigo, thioindigo, quinone groups related dye are vat dye. specially vat dye carry ketone linkage.quinone vat dye are usually either anthraquinone derivatives or polycyclic quinone.
The difference between vat exclusive and vat inclusive is that vat exclusive is the price before tax is added on. Vat inclusive is the price after tax has been added on.
The difference between e-vat and vat is the time in which they take effect. The vat takes effect when a sale is made, and the e-vat takes effect when the sale is finalized. To know more about the VAT or VAT consultancy services please visit Proactive Consultancy Group - TPCGUK or you can call us at +44 207 193 7072
8.5 percent of the pre-VAT price.
Deferred output tax is recorded by the seller for the sale of things on credit, and the standard output tax is recorded for the sale of things that were paid for with cash.
vat inclusive- Gross price (price after adding tax)vat exclusive-net price (price before adding tax)
The difference is 8.5 percent of the purchase price, or 3.125 times as much at 12.5% as at 4%.
The material used could be made of wool and the dye that can be used is Acid Dyes. In case the material is made of blends of wool and polyester, the dye to be used will be Acid Dye for wool and Disperse Dye for Polyester. In case the material is made of cotton, the dye is Vat Dye and if blends of cotton na polyester, the dye to be used will be Vat Dye and Disperse Dye.
Nett is pre VAT on an invoiceGross it the total cost due (inclusive of VAT)Hope this helpsLiz. H
Divide by 1.whatever the rate is. ie If vat is 17.5% you would divide the gross by 1.175 to get the net figure, the vat is the difference between the two.
VAT (value added tax) is a utilized tax on products applied in every stages of production, from raw components to finished products. EVAT (expanded value added tax) is the same as VAT, but with a higher tax collection.