We will also look at taping the bottles lids in future as this may prevent any tampering with the goods and also if the tape has been removed then the customer will know if the bottle has been previously opened / used etc..”
We have some starch that doesn’t dissolve properly. When weighing out the usual amount and making it up you get a wallpaper paste consistency. We use it in a junior science experiment Making Plastic from StarchOh - I also got some 'Soluble' starch which I couldn't get clear at all even with prolonged boiling- most of it was settled out. Previous batches from the same school supplier clarified with minimum heating. I have also noticed that some bottles now say 'super pure' which to my knowledge is not an accepted method of stating the purity. I fear that standards of chemical purity/quality from school suppliers have recently taken a dive!
Thanks for the response Karen. To clarify, the caps have come a long way since the days of having to tape to reduce chance of leakage. The seals and thread on the bottle allow for some vapour release and so you do not get the bottle swelling from a buildup of pressure which can happen when a solvent becomes warm. This particular product does not suffer from this unless it is stored in very warm conditions and so we will now tape these so that the technician can see if the product has been opened and used etc. Finally, any hazardous chemicals we ship are also individually bagged as an additional precaution! Best regards.Why does that not happen as a matter of course? I am sure at one time all chemicals used to come with a plastic seal of some kind over the lid.
I've just checked my new pot of soluble starch. It's dissolved beautifully - got it from Better Equipped a couple of weeks ago.We have some starch that doesn’t dissolve properly. When weighing out the usual amount and making it up you get a wallpaper paste consistency. We use it in a junior science experiment Making Plastic from Starch