7/7/2023 0 Comments Spraypaint on taskboardBut that’s exactly what you’ll get if you don’t keep your kit clean. Start with a low pressure of around 100 bar and gradually increase it until you achieve a uniform distribution of material.ĭebris in your finish is never a good look. The key is to work with the lowest pressure needed to achieve an optimal finish. Increased wear and tear to gun parts and tips.In reality, using more pressure than necessary results in: It’s a common misconception amongst painters that upping the pressure will speed up the job and achieve a more even finish. However, if you’re at 200 bar and the spray pattern is spotty, you’ve probably got a worn out nozzle. Product distribution is uneven in the central area.More material is being applied towards the outer edges than the centre. You know your pressure is too low for the job on an airless paint sprayer when your pressure is around 100 bar and you experience the following: Check the product data sheet ahead of setup to avoid running into problems. Pimples, blisters, fizz holes, runs and overspray are just a few of the issues that can result from incorrect gun setup or using the wrong size spray tip. Oops.īoth scenarios will ultimately slow down production and put you behind schedule. You will set up your work station, have a quick read of the data sheet and realise that you need to allow 2 hours drying time and not the 15 minutes that you’d allocated.You will topcoat too soon and negatively impact the final finish.Don’t do it! If you get it wrong it will lead to one of two far from ideal scenarios: It can be tempting to guess drying times based on similar products that you have used in the past. If a product’s data sheet states a 4-hour drying time, 2 hours just won’t cut it. Whether you’re a DIYer who is eager to see the end finish or you’re a paint shop sprayer who is behind on a production run, impatience is your enemy. Read the data sheet and this won’t happen… Too much solvent or using too fast a solvent will accelerate drying time, resulting in a poor ‘sandpaper’ finish. So always follow the data sheet guidance on film thickness and get yourself a decent film thickness gauge. If you apply a thicker film than the manufacturer states, it will take longer to dry. Planning - consider how weather conditions might affect drying timesīuy paintshop heaters and dehumidifiers online.Reading the Technical Data Sheet for guidance on minimum temperatures and humidity levels.Investing in suitable heaters and dehumidifiers for your paint shop.But as any seasoned painter knows, there are many factors that can cause you to misjudge drying times and go in with the second coat too soon.Ĭold and humid environments will slow your drying times considerably and can negatively affect your finish in several ways. If you don’t leave enough time between coats, your paint finish will suffer. The technical data sheet, details the correct hardener and thinners to be used if applicable as well as spray gun set up, film thickness, drying and re-coat times. The manufacturer’s technical data sheet contains all the information you need to get the finish right, so do yourself a favour and familiarise yourself with it in advance of using a product. This little spraying sin is responsible for so many bad paint jobs, especially amongst newbie sprayers. Not reading the manufacturer’s technical data sheet PART ONE: Painter mistakes that contribute to a poor finish 1. PART THREE: Poor finish - surface texture Wrinkling/lifting (urethanes and enamels).Not reading the manufacturer’s technical data sheet (TDS).PART ONE: Painter mistakes that contribute to a poor finish
0 Comments
Leave a Reply. |