This is a article i posted on another forum on Particles preperations so i copied it over to here for you to use if you like,it is only a rough guide but you will find it is not far out in terms of soaking and cooking times,as for PVA bags then the ideas already given are the ones to follow,feel free to copy this if you like...thanks.
Particles are used in fishing a lot these days and as such need to be right so they offer no harm to the fish,uncooked Particles can cause untold damage to the fish even death so it is important you prepare them the right way.
Like many things there are slight alternatives to use because of preferences used by others but over all there is a rule of thumb to follow and if followed you should find it will help you no ends in making the most of your particle baits,the flavour,colouring and texture all come from the correct preparation and although you can buy particles like Sweetcorn and Hemp precooked ready for use they can work out expensive so buying in bulk from your local farm shop or pet shop can and will save you a load of money but you are buying the natural seeds so they need preparing in the right way so with all that being said i think a list of the common particles used today is needed.....
ALL THE FOLLOWING HAVE THE SAME SOAKING/COOKING TIMES.
BROAD BEANS
BLACKEYED PEAS
MAPLE PEAS
PEA NUTS
RED KIDNEY BEANS
TARES
CHICK PEAS .... these can be used from tin if precooked.
Soak for 12 hours ...... boil for 30 minutes for all the above particles
The next three have a longer soaking time.
HAZEL NUTS
MAZE
TIGER NUTS
These should be soaked for 24 hours .... boiled for 30 minutes.
HEMP
Should be soaked for 12 hours..... boiled until split...1 minute is the norm but could take longer.
WHEAT
SWEETCORN
Although sweetcorn can be used direct from tins you can boil them for around 20 minutes to give them a soft texture and it helps if you are adding colour or flavours to them.
Wheat is soaked for 12 hours and no need to boil but you can do the same as sweetcorn so it takes on colour,flavour and becomes softer
There you have it there might be a few i have missed off the list like pearl barley that i know some use but over all i think i have covered the most common ones used today but if you need or want to know about the Pearl Barley preparation then follow the top list of times for Broad Beans ext.
Remember this is meant as a guideline only and variations are available but these are personal preferences really so what i have put here is a rule of thumb guide ..... good luck.