Gutenberg’s secret alloy for lead type contained not only lead, but also tin and antimony. Primitive experiments in pouring hot metal type left gaps in the printing from some letters being smaller than others due to shrinkage while cooling. Unlike most elements, the highly toxic antimony has the property of expanding as it cools from molten to solid, not unlike water turning to ice. Its melting point is over 600°. Most people equated softness with a low melting point for metals, but the fact was that the melting point of lead was nearly 100° higher than that of tin. Like mixing silica with soda to make glass, mixing the three metals together changed the melting point of all three. The lead kept the type metal from being too brittle, while the tin made it more durable so it could withstand the pressure of the press without deteriorating. But antimony, expanding while the other elements contracted, provided the essential ingredient of dimensional stability so that each character of. When I asked why she didn’t take it with her to the bathroom, she said she got the one she took wet by accidentally dropping it in the water. My sister stretched out her hand to take it from behind the door and I got a huge boner in my shorts just with the thought of my sister standing naked just behind that door.I wanted to push the door and fuck my sister in the shower but I controlled somehow. When my sister came out of the shower, she was looking dead hot with the wet hair. She applied moisturizer on her arms and thighs and I was having a hard time not to look at her!My sister had to shop so we went to the CP. There we realized that it was the Valentines day! The whole CP was decorated as a valentine zone with all the love goodies for sale. Couples and lovers were roaming hand in hand and it made my sister a bit emotional as she started to miss her boyfriend. I mischievously told her to make me her boyfriend for that night! She told me to shut up.Finally, my sister’s interview.
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