Opaque perfume bottles can be beautiful, but they can also make it difficult to determine how much perfume is left inside. Fortunately, there are a few methods you can use to calculate how much perfume is left in an opaque bottle.
Method 1: Shake and Listen
One simple method to determine how much perfume is left in an opaque bottle is to give it a gentle shake and listen for the sound. If you hear a sloshing sound, there is likely still a decent amount of perfume left. If you hear little to no sound, the bottle is likely almost empty.
While this method can give you a general idea of how much perfume is left, it’s not the most accurate method, as it doesn’t account for the density of the perfume. Some perfumes are thicker than others, and may not slosh around as much even if there is a significant amount of perfume left in the bottle.
Method 2: Weigh the Bottle
Another method to determine how much perfume is left in an opaque bottle is to weigh the bottle before and after use. This method is more accurate than the shake and listen method and takes into account the density of the perfume.
To use this method, start by weighing the full bottle of perfume on a kitchen scale or other digital scale. Make a note of the weight. Then, use the perfume as usual, and weigh the bottle again. Subtract the weight of the empty bottle from the weight of the full bottle to determine how much perfume has been used.
For example, if the full bottle of perfume weighed 200 grams, and the empty bottle weighed 100 grams, the perfume itself weighs 100 grams. If you weigh the bottle again after using it and it now weighs 170 grams, then you know that you have used 30 grams of perfume (170 g – 100 g = 70 g).
This method works best if you have a sensitive digital scale that can accurately measure small changes in weight. It may not be as accurate if the perfume bottle is very small or if the weight difference is minimal.
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Method 3: Use a Dipstick
Some perfume bottles come with dipsticks or wand-like applicators that can be used to determine how much perfume is left in the bottle. To use this method, insert the dipstick into the bottle and allow it to soak up the perfume. Then, remove the dipstick and measure the length of the wet portion. Compare this length to the length of a new dipstick to determine how much perfume is left in the bottle.
This method is more accurate than the shake and listen method but may not be as accurate as weighing the bottle. Additionally, not all perfume bottles come with dipsticks or wand-like applicators.