红色凹凸棒石黏土除铁增白工艺技术研究

纯凹凸棒石色白．因含杂质显红、灰、绿、黄等色彩。其红色质是铁，不仅影响白度、纯度。又会影响使用价值。依据色质离子的物化特性．用特定的化学原料．应用络合-还原技术，将白度在45％～55％的红色凹凸棒石黏土除铁漂白后，产品白度提高到93．5％、凹凸棒石含量可达85％以上．     

贵州某硬质高岭土开发利用研究探讨

高岭土由于具有良好的物理化学性能，用途十分广泛，贵州省高岭土矿大部分为含碳硬质高岭土矿，不能直接利用，开发利用贵州硬质高岭土资源，主要在于脱除矿物中铁，碳及锰等，提高白度及综合性能。通过试验研究，贵州硬质高岭土矿适于采用重选－焙烧－化学漂白除铁的工艺流程来加工处理，可以得到不同级别的高岭土产品。     

黑龙江煤系高岭土增白试验研究

对黑龙江省鸡西市某矿煤系高岭土进行了增白试验研究,采用酸法处理降低煤系高岭土中杂质含量,煅烧白度得到了明显提高,促进了煤系高岭土的开发利用。     

影响棉热转印产品白度的因素分析

采用9种荧光增白剂对棉布进行处理,探讨了增白剂结构、架桥剂和增白剂商品中的添加剂对棉热转印产品白度的影响.研究表明:增白剂分子结构中的羟基基团越多,增白剂耐热性能越差,棉热转印产品的白度越低;增白剂商品中的添加剂对其耐热性能影响不大;架桥剂能显著提升增白剂的增白效果和耐热性能,使棉热转印产品白度得以提高.     

羊绒保护剂在白绒漂白中的应用研究

在碱性条件下,用双氧水对白绒进行漂白,并在漂白过程中加入羊绒保护剂,以改善漂白后羊绒纤维的性能。通过单因素试验,重点分析了白绒漂白过程中各助剂用量对漂白效果的影响,以漂白后纤维的白度、碱溶解度等指标来评价各因素对漂白效果的影响,得出白绒漂白的最优工艺为:双氧水70%(omf),氧化稳定剂25%(omf),羊绒保护剂4%(omf),氨水1%(omf),浴比1︰20,55℃,85 min。普通白绒的白度为48.73%,碱溶解度为12.35%,单纤维强力为4.96 c N,经上述工艺漂白后的白度为66.52%,碱溶解度为13.83%。     

Predictions of Munsell values with the same perceived lightness at any specified chroma irrespective of hues—Determination of any tonal colors

Simple formulas are proposed for predicting the Munsell value of colors with the same tone (the same values for whiteness‐blackness, perceived lightness, and chroma irrespective of hue). The formulas can be used for any tone. In other words, the method can determine the Munsell value with the same perceived lightness at any specified chroma irrespective of hue. The chromatic strength (CS) function is only used for the derivations. The formulas are very simple, and can be used not only in the colorimetry but also in the color design field. The concept described in this study is that a common CS function can be used for transforming each of the three color attributes (hue, lightness, and chroma) from their uniform color space metric to their corresponding color appearance space attribute. © 2010 Wiley Periodicals, Inc. Col Res Appl, 2011     

Quantitative evaluation of perceived whiteness based on a color vision model

This article describes a new perceived whiteness index, C/V index, which focuses on the brightness‐enhancement effect of color components included in the spectral reflectance factor distribution of approximate white objects or in the spectral power distribution of illuminations. The index is developed on the basis of a color vision model. The perceived whiteness of 18 approximate white samples was evaluated, and then a predictability of the index was compared with 17 types of existing whiteness indices. As a result, the C/V index was one of the indices indicating the best predicting performance. The aforementioned findings show that the C/V index is effective in evaluating the perceived whiteness of approximate white objects and the brightness‐enhancement effect of color components is an important factor in determining the perceived whiteness. © 2009 Wiley Periodicals, Inc. Col Res Appl, 2010     

Structural whiteness of the multi-component glaze dependence on amorphous photonic crystals

A kind of enhancing mechanism of structural whiteness dependence on amorphous photonic crystal (APC) structure is introduced in this paper. In the glaze system composed of albite, kaolin, talc, calcite, quartz, titanium dioxide and zinc oxide, the APC structure will be produced by using quartz as a variable to induce the phase separation. Under different polarities between Ti, Zn etc. and Siion, the separated spheres with the core-shell structure can be obtained and then make up opal-like APCs in the glaze layer. In addition to inner and outer layers of core-shell spheres, the calculated results of refractive indices clearly show the great difference between the particles and the matrix. As a result of different refractive indices, the multiple scatting of visible light plays a key rote in the structural whiteness. However, due to the decrease of the cationic content, APCs with the reverse opal structure would be formed in the interface between glaze and body. Ultimately, the glaze appearance reveals extremely high structural whiteness due to the special APC structure.     

颜料特性与铜版纸涂层质量

分析研究颜料颗粒对铜版纸印刷性能及光学性能的影响。     

不同热处理对籼米及其半干粉品质的影响

为考察不同热处理对籼米籽粒及其半干粉品质的影响,采用不同条件热处理籼米籽粒,分析米粒表观裂缝增加程度与其内部水分的关系,并进行半干法制粉(含水率为30%),测定不同热处理对大米粉微生物、破损淀粉及白度的影响。结果表明,热处理后的米粒,表观裂缝开始明显增加时米粒内部水分均小于8%;3种热处理(60℃90 min,120℃15min及180℃1min)后的大米调制粉微生物被有效抑制,且超高温短时(120℃15min,180℃1min)抑菌效果优于低温长时(60℃90min),破损淀粉、白度及糊化特性与干磨粉差异显著(P0.05),更接近湿磨粉。通过测定米粒内部水分可判断米粒表观裂缝增加的程度,且热处理大米籽粒进行半干法制粉其粉质特性与湿磨粉相当。