Comparison
| Han purple | Han blue | |
|---|---|---|
| Chemical formula | BaCuSi2O6 | BaCuSi4O10 |
| Minimum temperature for production | 900–1000 °C | c. 1000 °C |
| Manufacture time | 10–24 hours | 20–48 hours |
| Decomposition temperature | 1050–1100 °C | >1200 °C |
| Thermally stable? | No | Yes |
| Stable in acid? | No | Yes |
| Color increase when ground? | Yes | Yes |
Read more about this topic: Han Purple And Han Blue
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“It is comparison than makes people miserable.”
—Chinese proverb.
“The comparison between Coleridge and Johnson is obvious in so far as each held sway chiefly by the power of his tongue. The difference between their methods is so marked that it is tempting, but also unnecessary, to judge one to be inferior to the other. Johnson was robust, combative, and concrete; Coleridge was the opposite. The contrast was perhaps in his mind when he said of Johnson: “his bow-wow manner must have had a good deal to do with the effect produced.””
—Virginia Woolf (1882–1941)
“We teach boys to be such men as we are. We do not teach them to aspire to be all they can. We do not give them a training as if we believed in their noble nature. We scarce educate their bodies. We do not train the eye and the hand. We exercise their understandings to the apprehension and comparison of some facts, to a skill in numbers, in words; we aim to make accountants, attorneys, engineers; but not to make able, earnest, great- hearted men.”
—Ralph Waldo Emerson (1803–1882)