Abstract: An inkjet printing apparatus, method of printing ink using the same and method of fabricating display device are provided. The method of printing ink includes: ejecting ink in which a plurality of particles is dispersed from an inkjet head; irradiating the ejected ink with a first light and a second light having different wavelengths to acquire data on a first exit light and a second exit light emitted from the ink; calculating a concentration of the particles in the ink from the data on the first exit light and the second exit light; and checking whether the concentration is out of an error range from a reference value, where the first light has a wavelength of about 500 nm or less, and the second light has a wavelength of about 1000 nm or more.

Abstract: A construction method for insulating a building exterior. The method includes fixing an L-shaped anchor provided with a vertical portion and a horizontal portion on a building exterior wall, fixing a bracket, and fixing a plurality of lightweight stone insulating panels. The bracket includes a horizontal support portion, an upward fixing portion bent upward from the horizontal support portion, a downward fixing portion bent downward from the horizontal support portion, and an extending support portion extending forward from the horizontal support portion to the L-shaped anchor. The lightweight stone insulating panels includes an insulating board, a stone plate attached to a front surface of the insulating board, and a reinforcing board attached to a rear surface of the insulating board to the building exterior wall. The stone plate is supported by the extending support portion.

Abstract: Disclosed are a lightweight stone insulating panel and a construction method for insulating a building exterior using the same, in which an insulating board and a reinforcing board are integrally formed in a stone plate, so that the construction work is simple as a stone plate attaching process and an insulating process can be carried out all at once, and the stone plate can be prevented from falling from the building exterior wall even if the insulating board is completely destroyed by fire.

Abstract: The present invention provides a bleach activator for increasing the bleaching power of sodium percarbonate or sodium perborate and a bleaching composition including the same. The bleaching activator may be granulated, oil coated, or in capsulated form.