A method of making dental articles
A technology for products and teeth, applied in the field of dental product manufacturing, can solve problems such as limited efforts
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Embodiment 1
[0095] Example 1 - Masterbatch Resin Preparation
[0096] The formulations of Masterbatch Resins A, B, C and D are shown in Tables 1-4. To prepare Masterbatch Resin A, measure all components listed in Table 1 into a flask and stir in the dark for 8-24 hours until all solid contents dissolve and reach a homogeneous state. Masterbatch resins B, C and D were similarly prepared according to the compositions shown in Tables 2-4, respectively.
[0097] Table 1. Integration of Masterbatch Resin A
[0098] Element Percentage (weight%) bisphenol A dimethacrylate 50 polyethylene glycol diacrylate 30 Tetrahydrofuryl methacrylate 4 Silica (200nm particle size) 15 Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide 0.8 2,5-bis(5-tert-butyl-benzoxazol-2-yl)thiophene 0.2
[0099] Table 2. Integration of Masterbatch Resin B
[0100] Element Percentage (weight%) bisphenol A dimethacrylate 50 polyethylene glycol diacryla...
Embodiment 2
[0106] Example 2-36 Color array preparation
[0107] Mix masterbatch resins A, B and C from Example 1 in the proportions shown in Table 5 to construct Figure 5 The 36-color array shown. For example, test article 001 was prepared by mixing 20 grams of Resin A and 20 grams of Resin C in a bottle and stirring at room temperature for 2 hours until a homogeneous mixture was obtained. Other test products from 002 to 036 were similarly prepared according to the compositions shown in Table 5, respectively.
[0108] Table 5. Composition of color points on the 36-color array (mixing ratio)
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Embodiment 3
[0112] Example 3 - Color Calculation
[0113] Step 1: Measure the spectral reflectance S(λ) or transmittance of the target sample with a UV-Vis spectrometer, and calculate the X, Y and Z color coordinate values.
[0114] XYZ color coordinates are calculated according to the following formula:
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[0119] where x - 、y - and z - is has such Figure 7 (a) CIE standard observation function for the function shown;
[0120] where I(λ) is the Figure 7 (b) Spectral power distribution of the CIE standard reference illuminant (D65 in this case) for the function shown. Integrals are calculated over the visible spectrum (390 nm to 830 nm).
[0121] Step 2: Convert the calculated X, Y and Z values into L* according to the following formula 1 、a* 1 and b* 1 value:
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[0125] in
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[0128] Here, X n , Y n and Z n is the CIE XYZ tristimulus value referenced to the white point (th...
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