Mprempren, akwan abien titiriw na ɛwɔ hɔ a wɔfa so siesie silika. Biako ne osutɔ kwan, na ne kwan a wɔfa so yɛ adwuma no nyinaa ne:
Nea edi kan no, wɔde quartz anhwea ne soda nsõ di dwuma wɔ ɔhyew a ɛkɔ soro mu denam pɛtro ngo anaa mframa a wɔde yɛ nsu a wɔde yɛ nsu a wɔde yɛ adwuma so. Afei wɔde nsu ahwehwɛ a ɛwɔ mfiridwuma mu no fra nsu mu ma ɛyɛ aduru a ɛyɛ mmerɛw a ɛwɔ dodow pɔtee bi mu. Wɔ tebea horow bi mu no, wɔde acid bi ka ho ma ɛma silicon dioxide gu. Bere a wɔasiesie, wɔayiyi, ayow, na wɔabubu akyi no, wonya aduru no silica. Wobetumi akyekyɛ osutɔ kwan no mu bio ayɛ no akwan pɔtee pii te sɛ acid kwan, Sol kwan, carbonization kwan, ne nea ɛkeka ho.
Wɔ China no, wɔfa acid kwan no titiriw. Nea ɛka acid kwan no ho ne sɛ wɔde sulphuric acid (anaasɛ acid afoforo) bɛyɛ adwuma wɔ silicates a ɛtumi nwura mu no mu. Sɛ reaction solution no du pH bo pɔtee bi a, wogyae acid a ɛka ho no, na ɛno akyi no, ɛyɛ onyin. Afei, wɔde afrafrade no yiyi mu na wɔde nsu hohoro mu mpɛn pii de yi Na2SO4 fi mu. Ɛno akyi no, wɔsoma no ma ɛyow na ɛyam na ama wɔanya ade no.