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<H3 style="WHITE-SPACE: normal; WORD-S
PACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(233,47,47); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 16px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 15px 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px">PPH-750铅笔硬度计概述</H3>

<P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit-text-stroke-width: 0px">PPH-750型<A title=铅笔硬度计 class=chain style="TEXT-DECORATION: none; BACKGROUND: url(http://www.nbchao.com/images/icons_cart.gif) no-repeat 100% 0%; FONT-WEIGHT: bold; COLOR: rgb(65,65,65); PADDING-RIGHT: 13px" href=http://www.nbchao.com/p/qianbiyingduji target=_blank>铅笔硬度计</A>是参照国标GB/T6739-2006《色漆和清漆 铅笔法测定漆膜硬度》设计制造的，提供了一种快速、经济的方法以测定漆膜表面耐划痕（及其它相应缺陷）的性能。</P>

<H3 style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(233,47,47); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 16px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 15px 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px">PPH-750铅笔硬度计试验步骤</H3>

<P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit-text-stroke-width: 0px">1、按照GB/T9271《色漆和清漆 标准试板》规定准备底材。</P>

<P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit-text-stroke-width: 0px">2、将铅笔削至露出铅芯5～6毫米（保持铅芯的圆柱形），保持铅笔与砂纸垂直以修磨铅芯端面，直至端面成完整的圆形，边缘没有破碎或缺口。铅笔每次使用前，都要经过如此修磨。</P>

<P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit-text-stroke-width: 0px">3、除非另有商定，在23±2摄氏度和50±5%湿度条件下进行测定。</P>

<P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit-text-stroke-width: 0px">4、按附图装好铅笔，以0.5~1毫米/秒的速度推动至少7毫米，以没有使漆膜出现3毫米及以上划痕的最硬铅笔的标示硬度表示漆膜的铅笔硬度。</P>

<P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit-text-stroke-width: 0px">5、平行测定二次，如果二次测定结果不一致（差值超过1个铅笔硬度单位），应重做试验。</P>

<H3 style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(233,47,47); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 16px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 15px 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px">PPH-750铅笔配置</H3>

<P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit-text-stroke-width: 0px">每台仪器配：高级绘图铅笔13支（6H～6B）。</P>

<P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit-text-stroke-width: 0px">PPH-750铅笔<A title=硬度计 class=chain style="TEXT-DECORATION: none; BACKGROUND: url(http://www.nbchao.com/images/icons_cart.gif) no-repeat 100% 0%; FONT-WEIGHT: bold; COLOR: rgb(65,65,65); PADDING-RIGHT: 13px" href=http://www.nbchao.com/list30/ target=_blank>硬度计</A>维护</P>

<P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit-text-stroke-width: 0px">1.PPH-I 750G铅笔硬度计使用时力求转动灵活，使用一段时间后，须在丝杆、轴承等转动部位注入机油。 &nbsp;</P>

<P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit-text-stroke-width: 0px">2.PPH-I 750G铅笔硬度计使用一段时间后，紧定螺钉，螺母须拧紧，以免松动。</P>

<P style="WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(65,65,65); PADDING-BOTTOM: 0px; PADDING-TOP: 0px; FONT: 14px/25px 'Microsoft YaHei', ??????, Arial; PADDING-LEFT: 0px; MARGIN: 0px; WIDOWS: 1; LETTER-SPACING: normal; PADDING-RIGHT: 0px; TEXT-INDENT: 2em; -webkit-text-stroke-width: 0px">关于<A href=http://www.nbchao.com/p/681 target=_blank>铅笔硬度计</A>的资料信息，可浏览一下：<A href=http://www.nbchao.com/p/681 target=_blank>http://www.nbchao.com/p/681</A></P>