Koch & Co Silica Gel FAQ (2024)

What are ?

Koch & Co Silica Gel Flower Drying Preserving Crystals (flower drying crystals) are an Eco-friendly, nontoxic, thirsty, granular compound that offers the best method of preserving the natural beauty of fresh flowers and bouquets.

How does Silica Gel work?

When you cover fresh cut flowers with the Silica Gel Crystals, the crystals absorb all the moisture from the flowers with little damage to the petals and without large amounts of mess.

What is Silica Gel?

Silica, or silicon dioxide (SiO2), is the same material found in quartz sand. The gel form contains millions of tiny pores that can absorb and hold moisture. Silica gel is essentially very porous sand but in the form of manufactured beads. Silica gel can absorb about 40% of its weight in moisture and can take the relative humidity in a closed container down to around 40%.

Is Silica Gel toxic?

No. It is a non-toxic, non-flammable, and a non-reactive product.

Can you eat Silica Gel?

No. Although it is nontoxic, you cannot digest Silica Gel Crystals. The small crystals can also cause choking in children and pets. To be safe, always keep the product out of reach of children and pets.

Should I wear gloves when using Silica Gel?

Although it is nontoxic, to be safe you should always wear gloves before you start using Silica Gel.

What type of container should I use to dry flowers with Silica Gel?

A clear, plastic container with an airtight lid is best. Make sure that the container is airtight, and no other elements can enter during the drying process.

How is it packaged?

Our Koch & Co Silica Gel comes in a 1kg resealable bag that can be recycled in a REDcycle program at your local supermarket.

How many bags of Silica Gel will I need to dry out my flowers?

Depending on the size of your flowers and the container, more than one bag of Silica Gel may be required to complete this process. Our Koch & Co Silica Gel is available in 1kg bags. You can purchase this in bulk if necessary.

What kinds of flowers can you dry with Silica Gel?

You can dry all flower types with Silica Gel. You can dry the whole flower including the stem, or you can remove the stem 1cm below the flower head and dry the flower heads.

Can you dry a whole flower bouquet using Silica Gel?

Yes, you can. To do this you will need to take apart the bouquet and separate each flower so that they can lay flat in your container and be fully covered with Silica Gel. If you are hesitant to separate your bouquet, we encourage you to seek the guidance and help of your local florist.

How long does it take to dry flowers with Silica Gel?

36 - 48 hours. This timeframe can vary depending on the thickness and size of the flowers.

What if the flowers aren’t completely dry after 48 hours?

If the inner petals of the flowers still feel like they have moister in them, place the flower back in the box for another 24 hours and then review again.

How do I get rid of excess Silica Gel and dust off my flowers after drying them?

To remove the excess Silica Gel inside the flower, hold the flower upside down and lightly tap the flower head to release the Silica Gel Crystals caught inside. To remove the outer dust coating, get a soft brush and lightly brush the flower petals until the dust is removed.

Can I wet the flowers after they are dry?

No. Do not try to wash the flowers or add water to them as this will ruin the dried flower.

What will the flowers be like after they are dried with Silica Gel?

After the process is complete the flowers will be delicate and may become brittle. When working with your dried flowers, you should handle them with care, do not press, bend, or squash the petals. The natural oils in your hands can also damage the flowers and shorten their shelf-life.

How do I store my dried flowers after the drying process is complete?

If you're not ready to use your dried flowers, store them in an airtight cardboard container that will allow for the flowers to be placed horizontally without being crushed. Do not store them in a plastic container or plastic bags.

Is Silica Gel reusable?

Our Silica Gel is reusable. You can easily re-activate the orange indicating beads by heating the silica gel in an open container in your oven or microwave, at a temperature of between 115 and 125°c. When the indicating beads return to their original orange colour, you will need to let the Silica Gel cool and then store.

How do I store Silica Gel after use?

After you have reactivated the orange indication beads, let it cool and store it in either the green bag it came in or a sealed container until you are ready to use it again.

How many times can you reuse Silica Gel?

3 to 5 times. If used more than this, ultimate results cannot be guaranteed.

Is Silica Gel Eco-friendly?

Yes, Silica Gel is made of the same material found in quartz sand. Silica Gel and orange indicating Silica Gel is non-toxic, pollution-free, and meets all international environmental requirements.

How do you dispose of Silica Gel?

You can dispose of the Silica Gel in the general waste disposal bin and recycle the bag in a REDcycle program at your local supermarket.

Koch & Co Silica Gel FAQ (2024)

FAQs

How many times can you dry silica gel? ›

After you have reactivated the orange indication beads, let it cool and store it in either the green bag it came in or a sealed container until you are ready to use it again. How many times can you reuse Silica Gel? 3 to 5 times. If used more than this, ultimate results cannot be guaranteed.

How much silica gel should I use? ›

We can therefore use a rule of thumb which states that: For a normal 90-day sea voyage, you need 16kg of silica gel for a 20-foot container. This corresponds to 0.5 kg per m3 cavity. A cupboard of 50 liters therefore requires 25 grams of silica to stay dry for 3 months.

What are the limitations of silica gel? ›

The main disadvantages of silica gels are the low water exchange and that is because a very high relative pressure is required for adsorption and the limited quantity storage capacity (Henninger et al., 2009). Hence, a large amount of silica gels is required especially for long-term energy storage.

How long does it take for silica gel to absorb moisture? ›

The beads begin adsorbing as soon as they are exposed to airborne humidity. The full process of desiccation may take hours or days, particularly if the humidity level is high, the objects being dried/protected are more hydrophilic, or the silica gel packets are small.

How low can silica gel absorb moisture? ›

Silica gel can adsorb about 40 percent of its weight in moisture. Once saturated, you can propel the moisture off and reuse silica gel by heating it above 300 degrees F (150 C).

What can silica gel do to your body? ›

The dehydration caused by swallowing silica gel may irritate the throat and nose, stomach pains, vomiting, constipation, and nausea. You should seek medical attention if: The silica gel beads are blue or pink (i.e., coated in cobalt chloride). You have vomited repeatedly or can't keep food down.

How often do you change silica gel packets? ›

How long can silica gel be stored ? Almost indefinitely. The key to retaining sachets usefulness is to keep it under air tight conditions until it needs to be used. Silica gel will absorb moisture from any environment, so a sachet left out in the open will immediately start taking up water vapour.

Should you take silica gel out of the packet? ›

One packet should be enough to dehumidify a container of snacks or spices, which should be kept sealed to prevent additional moisture from seeping in. In case it needs to be said, always keep the silica gel beads in their packets—don't cut them open and mix the beads into your food.

What are some interesting facts about silica gel? ›

It is technically a xerogel but gets shortened to gel even though it is hard, just to confuse people. Silica gel is a desiccant that can hold 30 to 40% of its weight in water. Water molecules stick to its surface, which is called adsorption.

Can bacteria grow in silica gel? ›

Surprisingly, more bacteria remain culturable in the gel than in an aqueous suspension. The metabolic activity of the bacteria towards glycolysis decreases slowly, but half of the bacteria are still viable after one month. When confined within a mineral environment, bacteria do not form colonies.

What are the negatives of silica? ›

Breathing in very small ("respirable") crystalline silica particles, causes multiple diseases, including silicosis, an incurable lung disease that leads to disability and death. Respirable crystalline silica also causes lung cancer, chronic obstructive pulmonary disease (COPD), and kidney disease.

How much silica gel is enough? ›

The general rule is that a minimum of 1.2 units of desiccant per 1 cubic foot of volume is needed to adequately protect a given space.

What flowers dry best in silica? ›

Very delicate flowers, like most roses, double peonies, and tulips, dry best in silica gel.

What can I use instead of silica gel for drying flowers? ›

Silica gel is expensive. A more economical alternative is to use 40% borax and 60% white cornmeal. This recipe takes longer to dry the flowers, so leave them in the container for 2 weeks. The old-fashioned way to dry flowers was with sand.

Can you dry silica gel and reuse it? ›

Fortunately, these beads can be rejuvenated and reused. To reactivate, spread the moisture-laden beads thinly on a baking sheet and place them in an oven preheated to 79.4°C for 15 minutes. This process drives out the absorbed moisture, restoring the desiccant's drying capabilities.

How many times can I reuse silica sand? ›

It may also be reused several times without losing its absorbency! Once it has absorbed water to its capacity , it may be heated to evaporate the water.

How often should I replace silica gel? ›

So, we recommend refilling the desiccant every 4 to 6 weeks. These tablets slowly dissolve at a rate relative to your inlet moisture content, temperature, pressure, and flow rate. We generally tell people they will need to top off every 4-6 weeks with an amount equal to about 1/3 of the overall desiccant bed.

What is the maximum amount of silica per day? ›

The upper safe limit has been reported as 700–1,750 mg a day. As silica is water-soluble, excess is simply passed out by the body in your urine, meaning it's unlikely to cause side effects if you take too much. Silica should be avoided by the following people: children – horsetail contains traces of nicotine.

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