JOVITEC Universal pH Test Paper Strip roll, pH Full Range 0-14, 2 Rolls, 5 m/roll

I just tested vinegar which turned Red with 1pH. Saliva was green 7pH and urine was gold = 5pH. So I have no idea why people are complaining about the strips not changing color. They seem like a quality product, easy to use and easy to read. Just don't ever expose the strips to any humidity or moisture. Do not store the strips in an area that will be exposed to steam or humidity which will ruin the strips. And use very dry hands and surface when handling these strips. Moisture will render them useless. If you're a novice and using these strips to test kombucha, use a small container to collect and test the booch. Dipping the strip into the fermentation container will ruin your batch as there are chemicals that will kill your Scoby. Anyway buy these with confidence and keep them bone dry.

I'm very happy with these. My friends will sometimes complain that the tapes don't last long enough. But this is because my friends pull-out a 4-inch strip each time they take a measurement. Personally, I cut a 1/2-inch strip and then dunk it with a pair of stainless steel tweezers. Works great. One roll of tape will last me almost six months. Also... each roll contains its own color chart. I don't need to worry about losing a separate card or other paper that has the color codes on it. And a roll of tape is cheap enough, that I don't get upset if I lose one. (Or if my friends "borrow" a roll.) What's not to like?

They came on time and each spool was in a cardboard box and then both boxes were placed inside of a sturdy plastic zip lock bag. The spool of ph paper is wrapped inside of the case with some sort of aluminum covered type of paper. I presume this is to protect the ph paper until you receive it and are ready to use it. To open the case and unwrap the ph paper I just slightly twisted and pulled apart the two pieces of the plastic casing to reveal and remove the wrapped spool of ph test paper then I reinserted the unwrapped ph test paper into the plastic case with the end of the ph test paper coming through the little slot on the case which then enables you to pull the desired length of ph test paper you require then you use the little serrated toothed edge on the case to help tear the piece of pH test paper off to use for testing. I performed a couple quick ph test using this product as you can see in the picture I provided it shows two longer yellowish strips one of those was used to test tap water and the other was used in spring water, the orangish colored test result strip was sweetened peach iced tea and the short little yellow test strip was saliva they all showed to be in the proper ph according to what google said they should be so I think it is safe to say they work! I will be using them when I make homemade skin care products as some of these items need to have their ph adjusted so they are not so harsh on the skin. It says each spool is 5 meters long I am actually surprised they did not appear to be that long and I have not measured them yet! But if they are indeed 5 meters each and if you used strips that are approximately an inch long you could get close to 196 ph test strips per spool! Which I think is an amazing deal for the price however I have not comparison shopped to be sure of this. I bought the 2 spool package since I was not sure of the quality and price and I was short on funds at the time. In the future I would probably order a larger package after I researched and determine how long the ph test strip paper is good for in storage and if it is actually the best deal. However these two spools may last me a lifetime with the amount of test I can perform depending on how easily it is to adjust the formulas I make... idk time will tell! I only make products for myself so I don't need these very often and they are only needed for certain formulas it all depends on the recipe and products that go into them if I need to check the ph levels and adjust them. Having the ph test paper now enables me to make formulas I have not been able to make and try in the past! So this is exciting! Knowing me I will probably also be testing all of the formulas I make even the ones that have claimed do not need to be tested and adjusted just to be sure they are correct! Trust no one and nothing! ;)

Used to sample ph of soil after dilution with deionized water. My only complaint is they do not tell you how long to wait for make the read.

This is easy to use

I bought this without looking at the 1-star reviews. The reviews I read and the video I watched lead me to believe it worked. I just had my water tested professionally and was interested in testing it myself, along with my filtered water, and other items I have. Don’t bother. It is nothing more than an orange dyed piece of paper that does not change color. I tried my kitchen faucet which I knew the reading, color did not change, and I knew it was not correct. Tried it on my expensive filtered water, which is Alkaline, same color. I then even tried it on my tongue like the person in the video, same color. I then sprayed a part with Windex, that did change color! But if you are testing the water, it did not change at all nor did it when I put it on my tongue. The pack was new and sealed properly so can’t even say it was an old batch. Would not buy, save your money. PS, it did stain my counter orange, that tells me all I need to know. Each strip I put down they all stained the counter the same orange tone.

Purchased for a science project. The kids were to blow air with a straw into a cup of water and then test the ph and compare with a cup that had not. There was no difference when I put the test strip in. I tested it on a couple things and the change was slow. It’s just not very vibrant and maybe slow to use. I’ve made my own with purple cabbage before and they seemed to work better. Not sure if it was simply a failed experiment or faulty strips. But I did test the strips on other things and the performance was eh.

Great for checking PH of car cooling system and even home well water.

perfetto per le attività laboratoriali casalinghe o scolastiche

Je m'en sers pour contrôler la préparation d' EM-A (microorganismes efficaces) , la précision est bien suffisante et plus fiable qu'un PH mètre BAS DE GAMME a moins de quelques centaines de € ou $, qu'il faut en permanence étalonner avec des "sauces" plus ou moins précises . j’étais chimiste, 34 ans en recherche, habitué à me servir de colorants ou de papiers ph pour les contrôles rapides. Pour les "ceuses" qui ne le savent pas, on ne trempe pas la bandelette dans la solution mais on en prélève une à deux gouttes que l'on place sur un petit morceau de bandelette PH. Un PH mètre fiable ça vaux une fortune et çà s’utilise en labo dans des conditions bien précises, mais pas devant le robinet ou la piscine !!. L'expérience en chimie ou en physique ne s’acquiert certainement pas dans les forums et autres YOUmachins. Avant de formuler de mauvaises critiques apprenez (pour certains) à vous en servir.

Utili e come descritte

Funktioniert wie es soll, einfach zu handhaben 👍

These work very well. In the photo you see the results of a control test, on the left the results of a vinegar (acid) solution and on the right a baking soda (alkaline) solution. The colour of the strips clearly indicates accurate pH measurement against the provided reference. I used these for a soil test to determine adding lime to tomatoe potting mix. They displayed a neutral result tested with the soil which looked the same colour as the testing paper but just wet. I think this result is why some people think it doesn't work. Would recommend over the cheaper options found on amazon. Shipped quickly, accurately and in good condition. Will buy again.