Chemical Forums
Specialty Chemistry Forums => Chemical Engineering Forum => Topic started by: annyfarzana on June 20, 2006, 03:59:19 PM
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Hi,
I am a student of Chemical Engineering. I've almost completed my graduation. Now I want to start a small business of manufacturing home made recycle paper. I need information about its demand and what equipments are very much essential for making home made paper. Is it possible to make white color paper ? Will anyone can explain me the steps of making smooth home made paper, please.
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Sorry to rant, but - as an almost graduate Chemical Engineer - aren't you supposed to know where to look for such information?
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I used to do work experience over the summer holidays in a paper mill. (we actually made massive rolls of tisse, but the principles are the same)
For white paper, you need to bleach your pulp (and possibly add a little TiO2 for bright white, or atandard white dyes). For other colours - use dyes.
Making the pulp should be easy - it is then watered right down and passed through mesh untill the appropriate thickness is aquired. For smooth paper - I would assume that you would need a finer particle size in your pulp (filter the diluted pulp?). Hardest part will be getting a smooth even layer on the mesh - practice should get you there. I think some may add a little binder to the pulp/dye/water mix to make the paper stronger.
I think I might try it too sometime. :)
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No it will need some bleech, some white pigment/filler some optical brightening agents and possibly some shading dye.
It is not possible to make white paper with bleech alone.
If you try it you'll get a dull pale yellow/grey colour.
Just about all commcerial white paper uses optical brightening agents to give the bright white colour.