How fast regular synthetic ice dulls blades
On regular synthetic ice, blades go dull fast. Sometimes within ten to fifteen minutes, and practically always within an hour. Since a typical public session runs about an hour, that means a skater loses their edge inside their own session.
What that means for running a rink
This is where the real problem shows up, and it is not only about money. To keep every skater sharp on a surface that dulls a blade in ten to fifteen minutes, you would have to re-sharpen after almost every use, which no busy rink can physically keep up with. So one of two things happens. Either the operator falls behind and skaters end up on dull blades, unable to hold an edge and blaming the ice; or the operator tries to keep up and the sharpening cost becomes very large. Neither is a small problem.
Why blades dull
A blade dulls wherever it meets resistance. On a surface that is too soft, the blade sinks in and has to push material aside, which is deformation friction, and that grinds the edge down. So the same softness that tires skaters also wears their blades. A harder surface that the blade rides on, rather than sinks into, is easier on both. This is why friction and indentation are the properties that decide it, explained in full on the What is synthetic ice? page. Neglect adds to it: a surface that is not kept clean and maintained gives the blade more to fight, and dulls it faster.
The exception: Glice
There is one exception. Glice went through a major breakthrough, and its surface was measured independently by the Fraunhofer Institute for Mechanics of Materials: very low friction, matching real ice glide at low speed, and very low indentation. Low indentation means the blade rides on the surface instead of sinking into it, and low friction means less grinding, so the edge lasts far longer. This is not a claim but what operators report:
- the Wallisellen figure skating club in Switzerland held an edge for one and a half to three months of training on a single sharpen, on the same edge that also covered weekly sessions on refrigerated ice;
- a family attraction in Aschheim, Germany sharpened once a week;
- a world-famous, brick-themed family theme park running up to a thousand skaters a day found that in about ninety per cent of cases a blade was still fine after multiple uses;
- at Red Bull Munich's Dantebad event, children skated intensively for several hours with practically no edge wear afterwards.
Every operator report depends on the same maintenance condition: edges last only while skates stay on the ice or rubber matting; hard flooring or asphalt ruins them fast.
What sharpening actually costs
Sharpening is not a minor line item. At one to five euros a pair, with hundreds of rental skates and thousands of visitors, it adds up quickly, and the surface decides how much you pay.
Take a season of 10,000 skaters. If you have to sharpen before every handout, that is 10,000 sharpenings, which at one to five euros a pair is €10,000 to €50,000 for the season. On a surface that holds an edge, you might sharpen every second handout instead, cutting that to roughly €5,000 to €25,000, or every third handout, nearer €3,000 to €17,000. The price per sharpen barely changes; the frequency, set by the surface, is what moves the total by tens of thousands of euros. Cost also depends on who does the work, volunteers or paid staff, and on consumables: a sharpening wheel runs around €105 and does roughly 160 pairs.
How the sharpening is done matters too. Professional manual sharpening is faster, but it needs skilled, trained staff who know how to do it well. Most entertainment venues do not have that on hand, so they use automatic sharpeners, which take longer per pair and cost more. That is why the time per pair and the labour cost vary so much from rink to rink, and why the tool below lets you set both. For the practical process, see how to sharpen ice skates.
Sharpening cost simulator
sharpenings × € per pair
Indicative only. Actual wheel life, labour and sharpening needs vary. Blade edges last only while skates remain on the ice or rubber matting; hard floors and asphalt ruin an edge quickly.
The condition that decides it
One condition runs through all of this, and it cuts both ways. On Glice, the long edge life holds only when the surface is well maintained; a neglected, dirty surface will dull blades faster. And on any surface, the edge only survives while skates stay on the ice or the rubber matting, because walking on a hard floor or asphalt ruins it in seconds. Check the edge regularly, because a clean, sharp blade is what keeps the glide.
In short
Is synthetic ice bad for skates? It depends on the surface. Regular synthetic ice dulls a blade within a session, which makes sharpening either an operational failure or a very large recurring cost. Glice, measured by Fraunhofer for very low friction and indentation, holds an edge far longer, so operators sharpen a fraction as often, and that difference is where the money is. Sharpening is never free, and at the scale of a real rink it is never cheap; the surface is what decides how much you pay.
If you are weighing paying, say, €10,000 or €20,000 more for a Glice rink, put your own numbers into the tool above and do the math. Most careful buyers find that, everything else being equal, the better surface pays that premium back in reduced sharpening alone within the first season, before you count skater satisfaction, retention or reputation.
