If mixing ratios are determined by weight, the mixture should be made using digital precision scales. If the mixing ratio is determined by volume, it can be mixed using volume containers.
Since epoxy resins and epoxy hardeners have different specific weights, it is not correct to measure using volume containers in a system where weight must be calculated. The amount of hardener should not be used more or less than the specified ratio. Increasing the hardener ratio does not cause faster drying, on the contrary, it may cause the system to remain flexible by disrupting the reaction account.
To calculate weight, choose a digital scale as sensitive as possible. Mixing error risks may occur because the scale indicators reflect the values in the sensitivity range to the screen by rounding them to the screen. For example, you cannot see a decimal value such as 1.5 g on the 1 g scale screen. All values between 0.6 grams and 1.4 grams will appear on the screen as 1 gram, and this range means more than 100% deviation. Do not mix less than 120 grams in 1 g precision scales. Low amounts of mixtures cause miscalculation of the resin / hardener ratio due to the balance sensitivity range and undesirable results in epoxy drying. We recommend that you use a scale with a precision of at least 0.1 gr to avoid error.
Also, calibrate your balance regularly and make sure it weighs correctly. You can obtain a fixed weight caliber scale for calibration or use an object whose weight you are sure to verify the balance.
At the moment of weighing, check each time that the weight option such as gram, kilogram is selected on the scale screen. Thanks to the mode feature in digital scales, it is possible to operate in different units. If you overlook this situation, it may cause you to prepare the wrong mixing ratio and experience negative drying.