活版印刷工具材料-鉛字
鉛字是構成鉛字版最重要的元素，鉛活字版屬於凸版印刷的方法，在西方又稱活字（moveable Type），鉛字所含金屬比例為鉛 80%、 銻 15%、 錫 5%。中文鉛字字面為正方形，各家鑄字廠鉛字的高度、大小、字面的工整度均須符合標準，才能讓各印刷廠在排版、印刷時通用，但各鑄字廠也會以側身不同的缺刻作或圖案為註記，例如風行鑄字社凹槽刻有風行二字、中南鉛字光復前於腰身刻有中南社字樣，光復後因機器汰舊換新而取消，換成兩道凹痕，來和其他的鑄字行做區隔。
成立於1969年的日星鑄字行，保有三種中文字體（楷體、宋體、黑體），有七種大小的字體，分別為初號字：42pt；一號字：27.5pt；二號字：21pt；三號字：15.75pt；四號字：13.75pt；五號字：10.5pt；六號字：7.875pt。大抵上來說初號字多用在標題，五號字多半用在內文，六號字則大多用於註腳。早期另有：新四號12pt、新五號9pt、七號5.25pt，但很少用。所謂pt就是point，是印刷行業常用單位，1pt=0.3514mm。也因此我們可以知道初號42pt即為1.476mm。號數愈小字體越大，號數越大字體越小，字面與印刷成品左右相反。初號、二號、五號；一號、四號；三號、六號為等三個比例系統。
每個字體常用字大約2000餘個，每個字約保持六到十個，也因次每種字號大約都有一萬多字，其中五號因為常用因此會更多，估算起來日星裡的鉛字至少有一百五十萬個字，其中也包含少數的日文、英文、花邊與特殊圖樣。
Type is the most important element that constitutes the type board. Type board is a method of letterpress printing, and it also called movable type in the west. The metal ratio of type is 80% lead, 15% antimony, and 5% tin.
Established in 1969, Ri-Xing type foundry has three Chinese fonts: Kaiti, Songti, and Heiti also there's seven kind of typeface including size 0(42pt), size 1(27.5pt), size 2(21pt), size 3(15.75pt), size 4(13.75pt), size 5(10.5pt) and size 6(7.875pt). Generally, size 0 for the title, size 5 for context, and size 6 for the footnote. In the early stage, there are also new size 4(12pt), new size 5(9pt), and size 7(5.25pt) those are rarely used. Pt is as known as a point which is a common unit in the printing industry, 1 pt=0.3514mm. Therefore, we can know that size 0(42pt)=1.476mm. The small size specification the bigger typeface, and also the bigger size specification, the small typeface. The character plane is opposite to the printed product. Size 0, size 2 and size5; size 1 and size 4; size 3 and size 6 are proportional systems.
There are around 2,000 characters for commonly used, and each font will contain 6 to 10, thus, there are around 10,000 characters in each font also size 5 has the big amount for the most regular used reason. Ri-Xing has 1.5 million characters, and it also contains a few Japanese, English, lace, and special patterns.
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