The lava-lamp wax sinks on cooling, so the surrounding liquid must have a density a little less than 0.9. Ordinary alcohol (ethanol) has a density of about 0.8, and a 40-50 per cent aqueous solution would have a density that could be adjusted to just below that of paraffin wax. The solid wax would then sink.
Now you know what to pack for Bora Bora you can get started. When you are done, weigh your bags. Luggage allowance for Air Tahiti inter-island flights is 20 kg/45 lb per person and strictly enforced (due to plane size). Divers may have 5kg extra. Carry on hand luggage is 3 kg/6.6lb. See more absolutely 'must know' info about flying to Bora Bora to ensure smooth Bora Bora travel.
Indian railways apply a restriction to the total weight of your luggage in kilograms. You can see this as per the luggage rule. For your class of travel, the limit is 50 Kilograms. Though there are dimension limits, I think being standard size your luggages should not exceed them:n case if you have not paid and you are found to be carrying extra luggage you will be penalised. Anything above the maximum permitted luggage has to be booked in brake van (a goods carrying coach attached to almost every express/passenger train in Indian Railways).