Molten glass

Molten glass
Released							18 March 2002 (Update)
Members							Yes
Quest item							No
Properties
Tradeable							Yes
Equipable							No
Stackable							No
Noteable							Yes
Options							Drop
Examine							Hot glass ready to be blown into useful objects.
Values
Value							3 coins
High alch							1 coin
Low alch							1 coin
Weight							0.907 kg
Grand Exchange
Exchange							89 coins (info)
Buy limit							13,000
Daily volume							4,010,262
View real-time prices
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Advanced data
Item ID							1775

Molten glass is used in the Crafting and Construction skills, as well as some quests, to form glass items. It is created through the Crafting skill by using a bucket of sand and soda ash on a furnace, granting 20 Crafting experience. This only requires level 1 Crafting. Alternatively, players can use the Lunar spell Superglass Make, which combines all buckets of sand and all seaweed or soda ash in the player's inventory into molten glass, granting 10 Crafting experience per pair of items.

Molten glass is used in some quests such as Observatory Quest, Horror from the Deep, Wanted!, Desert Treasure I, Another Slice of H.A.M. and The Fremennik Exiles. Although you can't buy molten glass at any shop in the game, you can still buy buckets of sand and soda ash from the charter ship shops. This is especially useful for ironmen, who could buy both items and then smelt them in a furnace.

Uses - Comparing Molten Glass yield and XP

When using soda ash and buckets of sand in a furnace the molten glass yield is

1.0 molten glass per soda ash and bucket of sand.

When using Superglass Make with soda ash and buckets of sand the molten glass yield is

1.3 molten glass per soda ash and bucket of sand.

When used on a fire, giant seaweed turns into six soda ash upon successfully cooking, rather than just one given by normal seaweed. You can however fail, resulting in only one soda ash. Note that Cooking gauntlets do not decrease the cooking fail chance, however the Hosidius Kitchen cooking range effect still applies.

When used in conjunction with the Superglass Make spell, giant seaweed similarly acts as six regular seaweed and gives 60 Crafting experience per seaweed when cast. The combination of two giant seaweed and 12 buckets of sand yields on average 1.45 molten glass per bucket of sand, while the combination of three giant seaweed and 18 buckets of sand yields an average of 1.6 glass per sand, although with the latter some of the glass will fall on the floor as it overflows from the inventory. If it is not picked up, it results in an average of 1.45 glass per sand. Not picking up the glass will result in a higher rate of production, at a higher cost of materials. Since both methods using three giant seaweed and 18 buckets result in both a higher yield and rate, the combination of two giant seaweed and 12 buckets of sand is not recommended.

To increase input resource efficiency, Superglass Make can be cast in Ferox Enclave with an open looting bag to allow for quickly picking up the extra glass that goes on the floor. However, there are downsides, you cannot use spellbook resizing when at ferox and, this will reduce the amount of glass-per-hour produced.

The average Crafting experience per giant seaweed and rate of glass production varies:

• For an average of 1.45 glass per sand (two giant seaweed and 12 buckets of sand), each giant seaweed equals 538.5 experience when making lantern lenses or 669 experience when making empty light orbs. Using this method can produce glass at a rate of approximately 10,000 per hour;
• For an average of 1.45 glass per sand (three giant seaweed and 18 buckets of sand without picking up the excess), each giant seaweed equals 538.5 experience when making lantern lenses or 669 experience when making empty light orbs. Using this method can produce glass at a rate of approximately 15,000 per hour;
• For an average of 1.6 glass per sand (three giant seaweed and 18 buckets of sand and picking up the excess), each giant seaweed equals 588 experience when making lantern lenses or 732 experience when making empty light orbs. Using this method can produce glass at a rate of approximately 13,500 per hour.

These numbers include the experience from casting Superglass Make.

Creation

Furnace

Requirements

Skill		Level	XP
Crafting		1	20
Members		Ticks	2 (1.2s)
Tools	None	Facilities	Furnace

Materials

Item		Quantity	Cost
	Bucket of sand	1	18
	Soda ash	1	20
Total cost			38
	Molten glass	1	89
Profit			51

Superglass Make

Due to the random nature of the Superglass Make spell, the displayed output quantities are averages.

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Giant seaweedSeaweedSoda ashSwamp weed

Requirements

Skill		Level	XP
Crafting		61 (b)	180
Magic		77 (b)	78
Requires completion of Lunar Diplomacy
Members		Ticks	6 (3.6s)

Materials

Item		Quantity	Cost
	Bucket of sand	18	324
	Giant seaweed	3	624
	Astral rune	2	156
	Fire rune	6	30
	Air rune	10	50
Total cost			1,184
	Molten glass	28.8	2,563.20
Profit			1,379.20

Requirements

Skill		Level	XP
Crafting		61 (b)	130
Magic		77 (b)	78
Requires completion of Lunar Diplomacy
Members		Ticks	6 (3.6s)

Materials

Item		Quantity	Cost
	Bucket of sand	13	234
	Seaweed	13	169
	Astral rune	2	156
	Fire rune	6	30
	Air rune	10	50
Total cost			639
	Molten glass	16.9	1,504.10
Profit			865.10

Requirements

Skill		Level	XP
Crafting		61 (b)	130
Magic		77 (b)	78
Requires completion of Lunar Diplomacy
Members		Ticks	6 (3.6s)

Materials

Item		Quantity	Cost
	Bucket of sand	13	234
	Soda ash	13	260
	Astral rune	2	156
	Fire rune	6	30
	Air rune	10	50
Total cost			730
	Molten glass	16.9	1,504.10
Profit			774.10

Requirements

Skill		Level	XP
Crafting		61 (b)	130
Magic		77 (b)	78
Requires completion of Lunar Diplomacy
Members		Ticks	6 (3.6s)

Materials

Item		Quantity	Cost
	Bucket of sand	13	234
	Swamp weed	13	5,083
	Astral rune	2	156
	Fire rune	6	30
	Air rune	10	50
Total cost			5,553
	Molten glass	16.9	1,504.10
Profit			−4,048.90

Crafting table

Molten glass can be made into glass items using the Crafting skill by using a glassblowing pipe on them. Each item requires one piece of molten glass to create. At peak efficiency it would seem just over 1800 glass items can be crafted in one hour.

Level	Item		Experience	GE Price	GP/XP
1		Beer glass	17.5	44	-2.57
4		Empty candle lantern	19	7	-4.32
12		Empty oil lamp	25	4	-3.40
33		Vial	35	2	-2.49
42		Empty fishbowl	42.5	3	-2.02
46		Unpowered orb	52.5	84	-0.10
49		Lantern lens	55	17	-1.31
87		Empty light orb	70	100	-1.27

Products

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Item sources

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Changes

Date	Changes
[[{{#explode:17 July 2007| |0}} {{#explode:17 July 2007| |1}}]] [[{{#explode:17 July 2007| |2}}]] (update)	The item was graphically updated with the rework of the Observatory Quest. The item's value was increased from 2 to 3.

Gallery (historical)

29 March 2004 ⁠– 17 July 2007	17 July 2007 ⁠– present

Notes

• All the ingredients for making molten glass (seaweed and sand) can be found on the island of Entrana, except buckets, but there is a Tool leprechaun found near the Hops patch on Entrana from whom you can withdraw buckets if you have them. There is a sandpit, seaweed spawns, a range for cooking seaweed into soda ash and a furnace to make the molten glass. There is even a glassblowing pipe spawn in a nearby house.