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Elementary Study of IR Reflectance properties of organic and inorganic pigment formulations

机译：有机和无机颜料配方的红外反射特性的初步研究

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1. The NIR Values of each single colour has been studied individually and it is observed that few pigments show very high IR reflectance values while few of the pigments are of low profile. When we desire pigment formulation of high NIR properties, pigments of high reflectance are selected and vice-versa. Pigments like titanium dioxide, signal red, cadmium chro-mate, Sudarshan yellow are of high reflectance values and pigments like Red oxide of iron, yellow oxide of iron, chromium oxide phthalocynine blue and phthalocynine green and carbon black are of low reflectance profile (Table no. 2). By the study of combination of two pigments, it has revealed that how shade changes and what happens to their NIR values. From this study, we can choose appropriate pigments for desired shade and NIR values (Table no. 3 ). It is found that by addition of TiO_2 to any formulation, the NIR values of the formulation can be hiked with little change of shade. Few pigment leads special role in formulation, as shown in a, b, c, d & e that Cd. Chromate and has dominating role and when added, it gives higher NIR value. Few pigments always decreases the overall NIR values, for examples - in the formulations mentioned at f, g, h, & i, the addition of Cr_2O_3 in the formulation, the NIR values are decreased due to addition of this pigment (Table -5a & 5b ). Thus, we see that the presence of few special kind of pigments always either hike the NIR values or reduce the NIR values. Formulations mentioned at recipe c & d for olive green shade are found to be best among the others as only these formulations have shown the required NIR values i.e. from 55-70% (Table 5(a). The NIR values of natural leaves and NIR values of recipe c & d are neck to neck. This is illustrated in the Fig. 3. Recipe 'A' is good for light olive green shade and recipe 'D' resembles for dark stone shade but all the same, NIR values of this recipe are high enough (Table 4(a)). Recipe no. 2 is acceptable for Deep Brunswick green in respect of shade and NIR values both (Table 4(b)).
机译：1.已经分别研究了每种单色的NIR值，并且观察到很少的颜料显示出很高的IR反射率值，而很少的颜料具有低轮廓。当我们需要高NIR性能的颜料配方时，选择高反射率的颜料，反之亦然。颜料如二氧化钛，信号红，铬酸镉，苏达山黄具有高反射率值，而颜料如铁的红色氧化物，铁的黄色氧化物，氧化铬的酞菁蓝和酞菁绿和炭黑的反射率低（表2号）。通过研究两种颜料的组合，它揭示了阴影如何变化以及它们的近红外值发生了什么。从这项研究中，我们可以选择合适的颜料以获得所需的阴影和NIR值（表3）。发现通过将TiO 2添加到任何制剂中，可以在几乎没有阴影变化的情况下提高制剂的NIR值。如Cd的a，b，c，d和e所示，很少有颜料在配方中起特殊作用。铬酸盐具有主导作用，添加时可提供更高的近红外值。很少有颜料总是降低总NIR值，例如-在f，g，h和i提到的配方中，在配方中添加Cr_2O_3，由于添加了该颜料，NIR值降低了（表-5a和5b）。因此，我们看到很少有特殊种类的颜料的存在总是会提高NIR值或降低NIR值。发现在配方c和d中提到的橄榄绿色的配方是最好的配方，因为只有这些配方显示出所需的NIR值，即55-70％（表5（a））。天然叶子和NIR的NIR值配方c和d的值并驾齐驱，如图3所示。配方“ A”适用于浅橄榄绿色，配方“ D”适用于深色石头，但NIR值相同配方足够高（表4（a）），对于深色布伦瑞克绿色，在阴影和NIR值方面都可以使用2号配方（表4（b））。

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