WHAT ARE THE DIFFERENCES BETWEEN THE DIFFERENT VERSIONS OF THE HARIO V60?
Before we delve a little into the physics to better understand the importance of the material used in coffee brewing, let's introduce the different types of V60.
PLASTIC HARIO V60
| Size | Theplastic Hario V60 comes in3 sizes: 01 for 1-2 cups, 02 for 1-4 cups and 03 for 1-6 cups. The plastic version is the only one in which size 03 is produced. |
| Color | Most often you will come across the clear version, but it is also produced in white, red or brown. |
| Weight | Lightweight, size 02 weighs just over 100g. |
| Durability | For the proportions of the material, it's durable. |
| Travel | Can be used in a variety of conditions and you don't have to worry about instant breakage as much as with other materials, i.e. glass or porcelain. Where it is less practical for travel is in its shape. Itcannot be folded as easily as, say, theAeropress Go. |
| Material | Polypropylene (BPA-free) in the case of colored V60 and thermoplastic styrene-acrylonitrile resin (BPA-free) in the case of clear V60. The material is classified as thermoplastic with a resistance up to 130 °C. |
| Temperature | Plastic has a slight advantage in heat resistance over ceramic in thatheat is not readily transferred or absorbed into the plastic, thus maintaining a constant temperature at all times. |
Summary: Plastic V60 in all colours offers a great balance of durability and low price. This product is also an ideal travel companion. Although plastic combined with heat carries a bad reputation, plastic V60s are safe. Otherwise, we wouldn't offer them on our e-shop.
GLASS HARIO V60 DRIP DECANTER
One of the other versions of the Hario V60 is the V60 Decanter, which is designed as a combined drip vessel and the container where the coffee drips into. While the entire container is glass, there is a plastic dripper at the top where you place a paper filter. At the narrowing, the container has a silicone heat-resistant corset that protects against burns. The size of the plastic dripper corresponds to the size V60-02. The coffee container has a capacity of 700 ml.
Thepreparation of the drip is exactly the same, the only difference is the appearance, it may also remind you of aChemex. The glass decanter is also very practical, you can use it as a serving vessel for other drinks, not just coffee.
PORCELAIN HARIO V60
| Size | Theporcelain Hario V 60 comes intwo sizes: 01 for 1-2 cups, 02 for 1-4 cups. |
| Colour | The range of colours in which the porcelain V60 is produced is one of the reasons why this version is popular. Like the plastic one, you will find it in white and red versions. The porcelain versions can also be found in various limited editions. Such as light pink, black, turquoise, light and dark blue or even yellow. |
| Weight | Porcelain is the heaviest of all materials, weighing approximately 400g in size 02. |
| Durability | When it comes to breakage, ceramics should always be handled with care when in use. However, with good care, this V60 can last you a long time. |
| Travel | This ties in very well with its durability, you should be doubly careful when travelling. It is best to pack the V60 carefully. |
| Material | Porcelain |
| Temperature | Porcelain is a great thermal insulator, it can hold temperature to a certain extent, but I recommend pre-heating the V60 with hot water before use, this way it won't take so much heat away from the water used to make the coffee. Moreover, with porcelain you don't have to worry about releasing any substances. |
Summary: If you're looking for a design option to dress up your coffee nook, the porcelain version of the V60 is the way to go. You can often find the ceramic version in coffee shops, but it needs to be handled gently.
STEEL HARIO V60
| Size | Themetal version of the Hario V60 is only sold in size 02, i.e. for 1-4 cups of coffee. |
| Colour | There is no steel like steel, even in this processing you will find several colours. The V60 looks very elegant in matte black, your eye will definitely be drawn to the copper version as well. There will certainly be someone who will be attracted by the silver classic. |
| Weight | In terms of weight, the stainless steel V60 is between the plastic and ceramic versions, atjust under 300g. |
| Durability | You won't find a more durable version among drippers, but it is still prone to dents, in case of a strong impact. |
| Travel | This dripper will fitperfectly into your camping gear in addition to your kitchen, if you have the space. |
| Material | Stainless steel. This material does not absorb heat or affect the taste of the coffee. |
| Temperature | The thermal insulation may vary, but it is a good conductor of heat. As it gains temperature quickly, it also loses it quickly. |
Summary: With the stainless steel version, you really won't go wrong, this is a great durable and travel-friendly option that also looks very good.
3 FACTORS THAT AFFECT HEAT LOSS
Now it's time for a little physics. Making coffee is actually a combination of physics and chemistry, so it's no wonder. There are three factors that affect how much heat can be lost through a dripper when making filter coffee:
- Conductivity - measures how quickly heat transfers to and through the dripper.
- Heat capacity - how much heat energy it takes to change the temperature of the dripper
- Surface heat loss - how quickly heat is released from the dripper to the atmosphere
WATER CAPACITY
As some of you may well know, plastic is a good insulator, and conversely metal is a good conductor. Glass and ceramic fall somewhere in between. It follows that a plastic dripper can retain heat longer.
This tells us that plastic wins through conductivity - but by how much?
| V60 material | Plastic | Glass | Porcelain | Stainless steel |
| Conductivity (W/mK) | 0.2 | 1 | 4-5 | 16 |
ⓘ (The thermal conductivity coefficient λ (lambda) has a unit of W/mK and expresses the ability of the material to conduct heat from the warmer part, i.e. the hot water, to the colder part, i.e. the decanter)
As you can see from the table, porcelain is 20-25 times more conductive than plastic. This means that the heat will go from the boiling water to the ceramic V60 much faster.
SPECIFIC HEAT CAPACITY
Next we need to think about how much energy, i.e. heat from the water, the decanter is able to absorb. This is the specific heat capacity. The specific heat capacity is the amount of heat required to heat 1 kilogram of a substance by 1 temperature degree. Respectively, the heavier the V60 was, the more water it would need to heat. Because V60s are differently heavy from material to material, but the amount of water used to brew for a given amount of coffee is the same, the heating of drippers varies.
The main unit is called SI and is measured in joules per kg per degree - J-kg-1-K-1
| Material | Plastic | Glass | Porcelain | Stainless steel |
| Specific heat capacity (J/kgK) | 1250 | 753 | 1085 | 490 |
From the table we can see that plastic requires more heat energy per kilogram to raise the temperature by a given amount. However, a typical ceramic Hario V60 weighs four times as much as a plastic dripper, so it absorbs approximately 3.5 times as much heat as the whole at the same temperature change.
HEAT LOSS AT THE SURFACE
Just as we observe how quickly and how much heat is absorbed into the dripper during coffee brewing, we also observe how quickly and how much heat is released into the air. The rate of flow depends on the surface temperature. More conductive materials, such as metals, will transfer heat energy to the surface faster. Once the heat is at the surface, materials with a lower specific heat capacity will heat up to a certain temperature. So a plastic with lower conductivity and higher specific heat will lose significantly less energy during heat transfer than other materials.
The rate of heat loss depends not only on the material, but also on its structure, shape and temperature. That is why we can find drippers on the market with a curved surface that holds heat better. Steel radiates the least, but this is balanced by the fact that the high conductivity and low specific temperature mean that the surface temperature rises much faster. In addition, the maximum heat loss due to radiation is about half that of heat transfer.
BARISTA&CO METAL FRAME DRIPPERS
On the market we can also find drippers that are made only of metal construction with the absence of walls, thus behind them stands not the Japanese Hario, but the brand Barista & Co. The air with a conductivity of approximately 0.02 W/mK is the best insulator among those mentioned above. By using an open grid type structure, the amount of material in contact with the filter is to be minimised. These structures can help retain heat to some extent. However, even in these cases, the best material from which the drippers are made is still ultimately plastic.
All along, I've been comparing drippers primarily on paper. In the end, however, I have a demonstration of what it looks like when someone decides to try all this out in practice. That someone is Taylor Nowakowski of Canada's Eight Ounce Coffee. Taylor has taken the Hario V60 in all the finishes it comes in, so he's added glass to plastic, ceramic and stainless steel. He measured the entire process using a thermometer that he placed between the paper filter and the dripper.
And how did it turn out? The biggest differences were seen during preinfusion, or flowering, and a few seconds after. The glass dripper absorbed the least heat during the bloom. As expected, as quickly as themetal V60 absorbed heat, it also lost it. Pouring water during extraction had almost no effect on heat retention in the drippers.
You can see how the temperatures varied throughout the extraction in the graph below.
SO WHICH DRIPPER IS THE BEST?
If you're one of those who need a dripper that can withstand bumps and travel, I recommend choosing from durable and lightweight stainless steelor plastic options .
If, on the other hand, you're looking for a dripper with a nice look that will beautify your coffee nook in addition to making great coffee, then aporcelainversion will be the right choice. Just be careful not to break it right away when you show off your new beauty to your surroundings.
