Monthly Archives - 十二月 2020

About photochromatic materials

I. Basic knowledge of spectrum: ULTRAVIOLET rays are divided into three types according to different bands: UVC for those with a wavelength below 250 nm, UVB for those with a wavelength between 250 and 320 nm, and UVA for those with a wavelength between 320 and 380. The visible light range is 380-800 (nm) and the infrared light range is 900-1800 (nm). Two, photochromic principle: the use of UVA energy to open the photosensitive molecular bonds, so that it from [...]

The invention relates to a method for making luminous steps for garden special purpose

The utility model relates to a special luminous garden step, belonging to the field of garden engineering. It includes steps, plant planting trough and connecting trough. Plant planting slots are installed at both ends of the step, leaking holes are installed on the step tread, luminous plastic pipes are installed on the edge of the step tread, gutter is installed inside the step, and drain holes are installed on the kick surface of the bottom step. The drainage hole [...]