Volume 18 Issue 4

S.No.	Article Title & Authors (Volume 18, Issue 4, August - 2025)	Page Nos.	Status
1.	Effect of Substrate and Number of Coats on Thermal Emittance and Solar Reflectance Measurements of Paints João Victor Brochier Gonçalves, Deivis Luis Marinoski, Saulo Guths, and Ana Kelly Marinoski Ribeiro International Journal of Advances in Engineering & Technology (IJAET), Volume 18 Issue 4, pp. 132-154, August 2025. ABSTRACT This study investigated the impact of four substrates and the number of paint coats on both solar reflectance and thermal emittance. For the experiments, three types of spray paint (white, silver, and green) coated four substrates: ceramic, fibre cement, aluminium, and sandpaper. The methodology was divided into three main stages: sample preparation and painting, measurement of properties, and result analysis. Solar reflectance was determined using the ASTM E903 standard with a UV-VIS-NIR spectrophotometer, while thermal emittance measures following the ASTM C1371 standard with a portable emissometer. The samples were assessed in their natural (unpainted) state and after applying one, two, and three coats of paint. Results indicated that both the number of paint coats and the substrate type significantly influence these properties. For solar reflectance, the absolute variation from the first to the second coat reached 0.35, and from the second to the third, 0.19. Regarding thermal emittance, the non-metallic substrates painted with white and green showed slight variations (0.01 to 0.03) compared to the unpainted reference. However, significant emittance variations occurred for aluminium substrates painted with silver, with values increasing up to 0.72. These results highlight the importance of considering material combinations and paint coatings in building design to optimize thermal performance.	132-154	Online
2.	Cost-Effective and Eco-Friendly Mold-in-Colour (MIC) Solution for Automotive Aesthetic Plastic Parts Aarush Gupta, S Devarajan, Arun Kumar S International Journal of Advances in Engineering & Technology (IJAET), Volume 18 Issue 4, pp. 155-162, August 2025. ABSTRACT Vehicle Aesthetics strongly influence what people decide to buy. To achieve this, carmakers have used painting to create glossy surfaces; however, this process is expensive, harmful to the environment, and time-consuming due to VOC emissions and multiple steps. In this work, we look for more sustainable options by testing modified plastics—Polycarbonate (PC) and Acrylonitrile Butadiene Styrene (ABS)—as materials for decorative parts like bezels, interior trim, and pillar appliques. We focus on using these plastics in thin-walled injection molding, with wall thicknesses between 1.5 and 3 millimeters. These car parts need to handle heavy use and still look good in tough conditions. We checked how strong they are using engineering simulations and tested the surfaces for resistance to scratches and sunlight. The results show that production costs dropped by 35% and the carbon footprint shrank by 25%. Both ABS and PC matched or exceeded the usual standards for painted parts and offered better durability, scratch resistance, and weather protection. They also provided high-quality finishes, stability in heat, and lower weight and VOC emissions. Our findings highlight clear cost and environmental benefits. In addition, these findings can be applicable to other industrial sectors such as consumer electronics and medical technology, among others	155-162	Online
3.	Technology Prospecting in Mycopigments Isabela de Morais Silva, Juan Pedro Bretas Roa, Marcio Schmiele, Vivian Machado Benassi International Journal of Advances in Engineering & Technology (IJAET), Volume 18 Issue 4, pp. 163-172, August 2025. ABSTRACT Since prehistoric times, humans have been concerned with identifying and protecting their creations. With the advance of technology and mass production, the need arose for a formal intellectual property system to protect inventions and processes. Mycopigments have emerged as safe alternatives to synthetic pigments, attracting consumer preference and industrial interest. These pigments are produced under controlled conditions, with high productivity and without seasonal limitations, due to the genetic diversity of microorganisms. Fungi produce pigments in response to environmental conditions, offering advantages such as various colors, high yields, and ease of optimizing production. In addition, they have biological activities such as antimicrobial, antiproliferative, metal chelating, and antioxidant properties, making them economically viable and sought after by industry. This study aims to search for prior art in three patent databases to identify the number of technologies involving the production and application of mycopigments. To explore technological prospects for micropigments, patents filed in three databases were analyzed: INPI, Espacenet, and Patentscope. Records related to the production and application of fungal pigments were identified, focusing on filamentous fungi. The results reveal a growing number of international patents, especially in countries like Denmark, the United States, and Japan, while Brazil's participation remains modest, albeit with promising potential.	163-172	Online